Demystifying Real-Time-Bidding (RTB)?

Saurav Das
3 min readJun 17, 2023

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RTB, or Real-Time Bidding, is a process used in the advertising industry (AdTech) to buy and sell digital advertising inventory on a per-impression basis in real-time auctions. It is a fundamental component of programmatic advertising, which automates the buying and selling of ad placements.

In a traditional ad buying model, advertisers would negotiate and purchase ad space directly from publishers. However, with RTB, the process becomes more automated and efficient. Here’s how it typically works:

  1. User visits a website or app: When a user visits a website or app that contains advertising space, an ad request is generated.
  2. Ad exchange auction: The ad request is sent to an ad exchange, which acts as a marketplace for advertisers and publishers. Advertisers who are interested in displaying an ad to that specific user participate in a real-time auction.
  3. Advertiser bids: Advertisers submit bids for the ad placement, indicating the maximum amount they are willing to pay to display their ad to the user. These bids are typically based on factors like user demographics, browsing history, and the value they attribute to reaching the target audience.
  4. Auction winner selection: The ad exchange evaluates the bids and selects the highest bidder as the winner of the auction.
  5. Ad delivery: Once the auction winner is determined, the winning ad is immediately delivered and displayed to the user in the ad space on the website or app.

RTB offers several benefits to both advertisers and publishers. For advertisers, it allows for more precise targeting, as they can bid on individual impressions based on specific user data. This results in more relevant ads being displayed to users, potentially improving engagement and conversion rates. Additionally, RTB enables advertisers to optimize their campaigns in real-time, adjusting bids and creative elements to maximize performance.

For publishers, RTB provides an opportunity to monetize their ad inventory more effectively. It allows them to sell their inventory to the highest bidder, potentially increasing revenue. Additionally, RTB reduces the complexity of the ad selling process, as it eliminates the need for direct negotiations and streamlines the transaction.

RTB — A bit more realistic behind the curtain view

Check out the popular RTBs in 2023:

Overall, RTB has revolutionized the way digital advertising is bought and sold, offering greater efficiency, precision, and automation. It has become a key component of the ad tech ecosystem and has paved the way for the growth of programmatic advertising.

Other key concepts to understand: AdTech | MarTech | SSP | DSP | DMP | RTB | programmatic advertising

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Saurav Das

I write on few topics and explain it in simple terms. I will risk over-simplification to detailed correctness for brevity.