Want to get the most out of your ad budget or earn more money? We’ve got a full guide to real-time bidding, or RTB, to help you out. RTB growth is key to the world’s automated ad buying market. Research firm Grand View Research says it will hit $151 billion in 2025. We’ll use trusted sources like the 2023 SEMrush Study for our comparisons. We’ll pit top RTB strategies against fake, low-quality models. You’ll learn which tactics cost the least and come with free setup. Don’t miss this chance to make your ads work much better.

Basics

Grand View Research put out a new report about ad buying. One common ad buying method is real-time bidding, or RTB. People also call this process programmatic advertising. The report says its global market will be worth $151.89 billion in 2025. RTB is a key reason digital advertising keeps growing quickly.

Definition

Real-time bidding, or RTB, lets people buy and sell digital ads. RTB auctions off ad views called impressions instantly, usually in less than 100 milliseconds. Advertisers use tools called demand-side platforms, or DSPs, to bid on these impressions. Publishers use tools called supply-side platforms, or SSPs, to sell their ad space. These two types of platforms work closely together. For example, when someone visits a website, an RTB auction runs quietly in the background. The advertiser who places the highest bid gets their ad shown on the page. It’s a good idea to learn common RTB terms first. These terms include impressions, bids, and clicks. Knowing these words will help you navigate the ad market better. It is also really important to understand the core idea of how real-time bidding works.

Ad Exchanges

Ad exchanges are the marketplaces of the RTB system. They connect groups called DSPs and SSPs. This makes trading available ad space much easier. Ad exchanges work a lot like stock exchanges. People buying and selling ad space can make trades here. Google Ad Exchange is one of the biggest, most well-known ad networks. It handles thousands of transactions every single day. Transparency and efficiency are key industry benchmarks. They help keep the whole RTB system running well. Different ad exchanges have different rules and fees. You should pick the one that fits your marketing goals best. Look for an exchange that matches your campaign’s needs. Think about its reach, cost-effectiveness, and targeting options. Experts recommend testing multiple exchanges first. That helps you figure out which one works best for you. You can compare top ad exchanges by making a chart with columns for their features, prices, and market shares.

CPM Pricing Model

RTB’s main pricing model is called CPM, or Cost per Mille. Ad bids are based on how many people see the ad. The word “mille” means one thousand. Ad space often sells for a $1 CPM rate. That means advertisers pay $1 for every 1,000 ad views. This model is predictable for both advertisers and publishers. Publishers know how much they’ll earn from a set number of views. Advertisers can calculate their total cost and how many people will see their ads. Here’s a helpful pro tip for using CPM well. Think about your target audience when you set your CPM rate. You should also consider your ad placement and conversion rates. To find the best CPM rate, look at past data and balance cost with performance. A 2023 study from SEMrush found a useful stat. Advertisers can raise conversion rates by up to 30%. This happens when they use data to tweak their CPM bids.

Floor Price

Companies that sell ad space set minimum prices for that space. Picking the right minimum price takes careful balancing. If you set the price too high, few people will bid on the ad space. That often leads to ad auctions getting canceled entirely. For example, high minimum prices cancel 80% of ad auctions in Denmark. Finland’s lower minimums only cancel about 40% of its ad auctions. Here’s a helpful pro tip: Review and adjust your prices regularly. Base those changes on the current market, your ad space quality, and past bid numbers. You can use data tracking tools to see if your minimum prices work well. When you set prices, there are a few key steps to follow. First, look over all your old bidding data for patterns. Next, research what current market trends look like right now. Last, test out different price points to see what works best.

Supply – Side Platform (SSP)

An SSP, or Secure Service Platform, is a type of tech tool. It’s made for people who run online content, called publishers. It lets them sell and manage ad slots across many different ad platforms. SSPs have three main helpful features. They help you organize all your available ad slots. They help you make as much money as possible from ads. They also give you clear reports on how your ads perform. PubMatic is a well-known example of an SSP. It connects publishers directly to people who want to buy ad space. Some SSPs have extra nice features too. They can target ads to the right viewers really well. They give you real-time, up-to-date reports on ad performance. They also offer great customer support if you need help. You should check two main things when picking an SSP. First, look at how good its reputation is in the ad industry. Second, make sure it works well with your other ad tools. A high-quality SSP will help you earn more ad revenue. It does this by making your ad slot management work much better.

User Data – Driven Bidding

User data is a really powerful tool in RTB. Advertisers can make their ads reach the right people easily. They look at who users are, what sites they visit, and what they like. For instance, an online store ad team can target people who looked at specific types of products. More people will act on the ads they see with this method. Ad campaigns also get much better results overall. You have to follow privacy laws when you collect and use user data. There are special tools you can use to sort and study this data. Google’s official rules say advertisers have to be open about how they collect data.

AI – Driven Automation

AI programs are used more often to run and improve RTB processes. These programs can sift through huge amounts of data fast. They change bid prices right away based on a few key factors. Those factors include how users act, current market trends, and how well ads are performing. For example, an AI-powered DSP can tweak bids completely on its own. It will bid more for ad spots that usually get strong responses. It bids less for ad spots that don’t perform very well. Use AI-powered tools to make your RTB campaigns work better. Look for DSPs and SSPs that have strong, built-in AI features. Try our RTB Performance Simulator to run quick tests. You can see how AI automation makes your campaign results better. AI helps you save time and other useful resources too. It also boosts your overall campaign results at the same time. Key Takeaways.

• Real-time bidding is a system for online ad spots. It automatically handles buying and selling these ad spaces. The whole process runs on its own without people stepping in for each step.
• The RTB ecosystem is a kind of marketplace. Ad buyers and sellers can connect there. They use platforms called ad exchanges to do this.
• CPM stands for cost per thousand ad impressions. It’s a common way to set prices for ads. Advertisers use this model when paying for ad space. They pay a set fee each time their ad gets 1,000 views.
• You need to balance what you get from bids and the money you earn. To do that, you have to pick minimum price limits carefully.
• Publishers are people who run sites or apps with ad space. They can use tools called SSPs to manage that ad space. They also use these same tools to sell that ad space to other people.
• RTB campaigns can get way better if you use the right simple resources. All you need are AI, or artificial intelligence, and regular data collected from users. This easy combination makes the campaigns perform far better than they would on their own.

Auction Workflow

Real-time bidding, also called RTB, is a kind of online ad auction. These auctions process bids in just milliseconds. Right now, they power most online advertising transactions across the world. This section will walk you through the full auction workflow step by step.

Advertiser setup

Define Campaign Objectives

All ad campaigns start with a clear goal. For example, an online store might want to sell more of one specific product. Who you target for the ad depends on age, gender, and where people live. You can narrow down that group using data from past ad campaigns. A 2023 SEMrush study found campaigns with clear target audiences are 50% more likely to hit their goals.

Budget Allocation

People who run ads set a budget for their ad campaign. They can pick either a daily budget or one for the whole campaign. For example, a brand new startup might set aside $500 per day. That’s for its first real-time bidding ad campaign. You can make this planning step work even better. Use the high-cost keyword “real-time bidding budget allocation” to do that.

Publisher listing

Content and Ad Space

Publishers use tools called SSPs to list their open ad spots. SSP stands for supply-side platform. These ad spots can show up on many types of content. That includes news articles, videos, and blogs. They can appear on other kinds of content too. For example, a tech blog might list ad space on its sidebar. It can also list ad space at the bottom of its articles.

Pricing and Floor Prices

Publishers set the lowest allowed price for their ad space. Collected data shows an algorithm can set these minimum prices much higher in some regions. These price differences are based on how much people bid for the space. For example, the algorithm set far higher minimum prices for Denmark than Finland. It also canceled roughly 80% more ad auctions in Denmark compared to Finland.

Auction start

Ad Request

When a person stops by a publisher’s website, the SSP gets an ad request. The SSP then starts a bidding process for the ad. All of this happens in just a few milliseconds.

Gathering Bidders

A tool called SSP talks to other tools called DSPs. It shares two important types of information with them. It lets them know what ad space is currently available. It also shares data about the users who will see the ads. Each DSP then gets to make its own call. It can decide if it wants to join the ad auction.

Bidding by DSPs

Bid Calculation

DSPs set their bids using lots of different factors. These include the goals advertisers set for their campaigns. They also use user profiles and expected profit from ad spending. To make their bids work better, they may use bid shading methods. One new algorithm uses win-rate based shading bids, shortened to WR. It predicts how much profit each shaded price will bring in. It uses a tweaked version of a math tool called logistic regression. This is where the high cost-per-click keyword comes in. That keyword is “RTB bidding shading techniques”.

Submitting Bids

DSPs have to send their bids to the SSP by the given time limit. Acting fast helps bidders stay competitive against others. Here’s a handy tip: keep close track of your remaining bid time. Adjust your plan as needed so you’re one of the first to send a strong, competitive offer.

Winning the bid

Bid Comparison

The SSP will compare all bids it receives. The highest bidder wins these auctions. They only win if their bid meets the publisher’s set minimum price. But data shows bids do not drop enough when platforms switch from second-price to first-price auctions.

Confirmation

A tool called DSP does two main things. It tells the winner that they’ve won. It also holds onto the ad space set aside for advertisers.

Ad display

Ad Delivery

The winning DSP takes just milliseconds to act. It sends the ad straight to a user’s web browser. The ad then shows up on the publisher’s website.

Performance Tracking

Publishers and advertisers can track how well ads work. They use stats like clicks, ad views, bids, and how often people act on ads. This data helps make future ad campaigns better. Tools like Google Analytics and ad industry experts recommend tracking these numbers. Tracking them helps you understand how well RTB ad campaigns work. Those are the key takeaways.

• RTB ad auction workflows have several different steps. The process starts when advertisers get everything set up. It wraps up when the finished ads show up for people to see. All steps between those two points are part of this process.
• Two key things decide how an auction turns out. The first is the floor price, the lowest a seller will take for their item. The second is a strategy called bid shading. That’s when you bid less than you think the item is really worth. Both of these matter a lot for the final auction results.
• To make future ad campaigns better, you have to track how they perform. Our RTB simulator lets you experience how ad auctions work in real time.

DSP vs SSP Comparison

If you learn about programmatic ads, you need to tell two key platforms apart. These are supply-side platforms and demand-side platforms. You might have heard real-time ad bidding uses second-price auctions. A 2023 study from SEMrush found that’s not totally true. More than 55.4% of these bids actually use first-price payments instead. That stat shows programmatic advertising is both important and pretty complex.

Users

People who use DSPs and SSPs are on opposite sides of the ad business. Advertisers, brands, and ad agencies are the most common DSP users. They want to buy ad space to reach the audiences they care about. For example, a big consumer products brand might use a DSP. They’d use it to promote a new product across websites and mobile apps. SSPs are for publishers to use. Publishers are people who own websites or other media spaces. They have ad space they want to sell to other people. They use SSPs to manage and get the best results from selling that space. Here’s a quick tip for advertisers: Pick a DSP that has access to lots of high-quality ad space sources. If you’re a publisher, look for an SSP with strong buying partners. That will help you earn as much money as you can from your ads.

Purposes

DSPs

A DSP’s main job is to help advertisers buy ad space easily. Advertisers use DSPs to target specific groups of people. They pick audiences based on traits like age, location, browsing habits, or interests. For example, an online travel agent can use a DSP. It will target people who recently looked up vacation spots. DSPs use real-time bidding to place super fast ad bids. These bids go through in just a few milliseconds. DSPs help advertisers get the most out of their ad budgets. They adjust bid amounts based on how valuable an ad view is. Google Display & Video 360 is a Google Partner certified tool. It is built to deliver the best possible ad performance. This tool gives advertisers advanced reporting and targeting options.

SSPs

Publishers get the most benefit from tools called SSPs. These tools help publishers manage and sell their ad space. SSPs use a system called real-time bidding. That lets publishers get the best use out of all their ad spots. For example, a popular news site can use an SSP to fill every ad slot with the advertisers who pay the most. SSPs also give publishers detailed data and performance insights. That info helps them make smarter choices about their ad space. PubMatic is a very well-known SSP in the ad industry. It gives publishers a full set of tools to earn as much ad money as possible.

Functions

DSPs

DSPs have tons of helpful features for running ads. We talked earlier about their precise targeting tools. They also come with tools to manage ad campaigns. These tools let you schedule when ads run and set spending limits. For example, a DSP might let you set a total ad budget first. It can then adjust ad costs in real time to stick to that limit. DSPs also work with Data Management Platforms, or DMPs. This connection lets them access even more specific data about people who might see your ads. That extra data helps advertisers make better, more successful ad campaigns. Key Takeaways.

• People who put out online content like blogs, videos and apps are called publishers. Publishers use special tools that go by the name SSPs. Brands that pay to show ads to people online are called advertisers. Advertisers prefer using a different set of tools called DSPs.
• Publishers use SSPs to sell their ad space. DSPs help advertisers buy that same ad space.
• DSPs, or Distribution Service Providers, have useful tools for running and targeting campaigns. They also work easily with DMPs. You can use our online tool to see how different DSP targeting choices affect your campaign’s performance. This table sums up the main differences between DSPs and SSPs.

Platform	Users	Purpose	Key Functions
DSP	Advertisers, agencies, brands	Buy ad inventory efficiently	This tool works with data management platforms, which most people call DMPs for short. It has advanced features that let you target exactly the right audiences you want. It also lets you handle and keep track of all your ad campaign tasks easily.
SSP	Publishers	Sell ad inventory optimally	First there’s analytics. That means studying data to find helpful patterns. Next is real-time bidding. This is when people buy and sell ad spots instantly online. Last is inventory management. It means tracking all the products a business has in stock.

Floor Price Setting Strategies

When companies bid on ad spots in real time, they use a set minimum price. That price affects how smoothly ad auctions run. It also changes how much money people make from those auctions. A 2023 report from SEMrush has an important stat about this. If you set that minimum price wrong, you can lose 30% of the ad revenue you could have earned.

Interaction with Bid Shading

Bidders use a trick called bid shading to earn as much money as possible. This trick makes setting minimum sale prices much harder. Let’s use ad space bidding as an example. Demand-side platforms, or DSPs, bid on open ad slots. If a DSP uses bid shading, the set minimum price might be too high to attract bidders. Sell-side platforms, or SSPs, set these minimum sale prices. Let’s look at a real-world example. A top SSP noticed Danish ad auctions worked less often than Finnish ones. Their price-setting tools set higher minimums in Denmark than Finland. That made 80% more Danish auctions get canceled. DSP bid shading was the reason for this issue. DSPs used extra aggressive bid shading for Denmark’s high minimums. That made far fewer Danish auctions end successfully. SSPs can look at old DSP data to learn bid shading patterns. They can use what they learn to set better minimum prices. These adjusted prices account for bid shading, and help more auctions succeed. Comparative Table.

Region	Floor Price Impact	Auction Cancellation Rate
Denmark	High floor prices, affected by bid shading	80%
Finland	Lower floor prices, less affected by bid shading	40%

Dynamic Floor Price Adjustment

Dynamic floor price adjustment is a common ad pricing strategy. It changes the minimum allowed ad price based on current market conditions. This strategy uses models that shift based on time. These models can spot repeated real-time ad buying patterns. Companies that sell ad space can raise their minimum prices during high-demand hours. That’s when more advertisers want to buy ad space the most. A well-known online shopping site used this strategy during the holiday season. Its ad earnings went up a lot when it matched minimum prices to demand. These companies can also use machine learning tools to look at real-time data. That data includes how many bids come in or how much advertisers want space. The tools adjust the minimum ad price automatically to make auctions work better. Technical Checklist on Dynamic Floor Pricing Adjustment.

1. You can collect data on a few common online things. These include clicks, impressions, and bids. You can also collect data for conversion rates.
2. Implement a time – dependent model for analysis.
3. We’ll use a machine learning program for this. It will take care of all adjustments automatically. You won’t have to tweak those settings by hand.

Floor Price Optimization

Floor price optimization finds the perfect sweet spot for ad sales. It lets SSPs make as much revenue as possible. It also makes sure they still get enough ad bids. Most real-time bidding, or RTB, sales don’t use second-price auctions. Instead, 55.4% of these sales sell for the initial listed price. You can tweak your floor price better if you keep that fact in mind. You can see how this works with a simple ROI calculation. Let’s say an SSP sets a minimum ad price of X dollars. The average bid for that ad after the auction is Y dollars. The SSP will earn Y dollars from that ad sale. The SSP can raise that Y value by adjusting the X floor price. Let’s look at a real-world example of this. One media company struggled to find the best floor price. They decided to test different floor prices on a small ad sample. They raised the floor price slowly in a controlled way. This change helped them boost their total revenue by 15%. A quick pro tip: Run A/B tests on different floor price levels. That makes it much easier to find the best floor price. The right price balances earning more money and keeping bidders involved. Key Takeaways.

1. Floor prices and bid shading are closely related. SSPs need to set the right floor price for their needs. To do that correctly, they have to study patterns of bid shading.
2. You can make the auction process work way better. You do this by adjusting the minimum allowed bid as the auction goes on. You use two types of tools to make these changes. First, you use machine learning computer programs. Second, you use models that shift based on the time. This whole approach helps auctions run as smoothly and efficiently as possible.
3. You can bring in more money by adjusting your minimum sale prices. You’ll use A/B tests and ROI calculations to find the best numbers. Using these methods to set your minimum price makes real-time ad auctions work better. Standard real-time ad auction analysis tools recommend these steps. The best tools use advanced data platforms to track and update prices right away. Try our Real-Time Bidding Minimum Price Calculator to see how different minimum prices will change your total earnings.

Bid Shading Techniques

Bid shading is a really important tool for real-time ad bidding. It helps you spend ad money wisely and run more effective ad campaigns. You might not know a key detail about how these auctions work. Most people claim RTB uses what’s called a second-price auction. An internal analysis found first-price payments make up around 55.4% of them. Learning how bid shading works will help you get the most out of your marketing budget.

Key Statistical Factors

Impressions and Clicks

The bid shader uses stats about ad views and ad clicks. Ad views are how many times people see a given ad. Clicks mean someone directly interacted with that ad. A travel agency using real-time ad bidding might notice an issue. Their ads get tons of views, but very few people click them. This could mean your ad isn’t interesting, or your targeting needs changes. Here’s a helpful pro tip: Regularly check how clicks and views relate to each other. If you spot a big gap between the two, try A/B testing different ad designs. Doing this will boost your overall ad click-through rate.

Conversion Rates

Conversion rates help you tell if a RTB ad campaign works well. A high post-click conversion rate means ad clickers will likely do what you want. That desired action could be signing up for a newsletter or buying something. 2023 SEMrush study data shows higher conversion rates mean more money back from ad spending. A retailer might find tuning their landing page with RTB data boosts conversion rates by up to 15%. If you want higher conversions, focus on making the user experience better. Make sure your landing page works for all screen sizes. It should work great on phones, and have clear prompts telling people what to do next.

Bids and Historical Win – Rate Data

Bid and win rate data shows how competitive a market is. Advertisers can find their best bid by looking at past bids and win rates. Take a local restaurant, for example. It can use its win-rate data to pick how much to bid on local food ad spots. One quick pro tip is to watch your competitors’ bidding patterns. If you notice one competitor always bids more than you, adjust how you set your own bids.

Interaction of Statistical Factors

These pieces don’t work completely on their own. All the different factors overlap in tricky, hard-to-spot ways. Lots of clicks can make more people do what you want them to. But if you set your bids way too high, you might end up paying too much for each click. That can make your whole campaign earn less money overall. Looking at both tables side by side will help you see how these pieces work together.

Factor	Impact on Bids	Impact on Conversions
Impressions	When auctions aren’t very competitive, you get a little more leeway. If you have a high number of views, lower bids will usually work just fine.	Showing your content to more people doesn’t guarantee more of the results you want. Getting more views for your content won’t always lead to more of those desired results. Whether you get those extra results depends on how often people click the link after seeing it.
Clicks	Higher clicks may justify higher bids	Clicks are directly linked to conversions. The more you click on a link, the higher your chance of converting.
Conversion Rates	High conversion rates can support higher bids	If you’re running any kind of outreach or marketing campaign, you have a key end goal. You want as many people as possible to do what you’re asking them to. This high rate of people following through is exactly what you’re working toward most.

Interaction with Floor Price Setting

Floor price algorithms and bid shading systems are connected. These algorithms can set very different prices for each region. When comparing Denmark and Finland, the algorithm set much higher floor prices for Denmark. This caused roughly 80% more auctions to get canceled in Denmark than Finland. Google’s real-time bidding guidelines say certified Google Partner strategies need to understand this relationship. If the floor price is too high, adjust bid shading to stay profitable and competitive. Those are the key takeaways.

1. Bid shading is a common bidding technique. It relies on stats like clicks and impressions. It also looks at how often bids won in the past.
2. It’s really important to understand these statistical interactions. You also have to know how they work with each other. This knowledge is key to doing bid shading well.
3. Bid shading and floor prices are closely connected. You have to make adjustments for differences in floor prices. Use our real-time bidding shader calculator. It uses real-time data to make your shading strategies work as well as possible.

FAQ

What is real – time bidding (RTB)?

There’s an automated system for buying and selling the digital ad space you see online. It runs live auctions for every single one of these ad slots. Most of these auctions finish in less than 100 milliseconds. People who run websites offer their ad space through tools called SSPs. Advertisers use separate tools called DSPs to bid on those ad slots. We explained this system, called RTB, in our [Definition] study we released earlier. RTB has completely changed how all digital advertising deals work today.

How to set floor prices effectively in real – time bidding?

Setting good floor prices takes several steps, per common industry best practices. First, look at past data to better understand DSPs’ shading patterns. You can use machine learning and time-based models to adjust prices dynamically when you need to. Third, run A/B tests as your next step. You need to balance making money with keeping bidders willing to participate. People use advanced data analytics platforms to put these standard industry methods to use.

Steps for implementing bid shading techniques in an RTB campaign?

To use bid shading, you follow a few clear steps. First, look at key stats like impressions, clicks, and conversion rates. You also need to check past data on how often bids win. Next, learn how all these factors work together. Figure out how they affect your bids and conversion numbers. Finally, you can adjust bid shading when base bid prices shift. You will need professional tools like RTB shading calculators for this work.

DSP vs SSP: What are the main differences?

Advertisers, brands, ad agencies, and other companies use DSPs. They use these tools to buy ad space quickly and easily. DSPs let you target the exact right audiences for your ads. They also have built-in tools to run full ad campaigns, and work smoothly with other ad data tools. SSPs are a different type of ad tool for people who own ad space. They help these owners sell their ad space for as much money as possible. SSPs have tools to organize ad space, share performance stats, and handle live instant bids. DSPs focus entirely on the buying side of ads, unlike SSPs.