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What is Real-Time Bidding (RTB)?
Real-time bidding (RTB) is a relatively new advertising technology that allows online advertising to be purchased and served on the fly. Instead of reserving prepaid advertising space, advertisers bid on each ad impression as it is served. The impression goes to the highest bidder and their ad is served on the page. The closest analogy would be to the stock market: as stocks (online advertising spaces) come up for sale, brokers (advertisers) bid for the stock. Whoever bids the highest price gets that stock (the ad is served). Then the process immediately starts all over again.
How do advertisers decide when to bid on an ad? Real-time bidding (RTB) platforms buy data about users from across the web. The data is usually in the form of behavioral data gathered from tracking cookies. This information is then fed into the real-time bidding platform, giving advertisers insight into who is about to be served the ad.
Here’s a simplistic example of how real-time bidding (RTB) would work in the real world: A user spends a lot of time on financial websites, checking stocks and looking up Morningstar ratings. They arrive on a webpage that uses Real-Time Bidding to serve ads. On the back end, a major financial services provider has specified that they are interested in users that like stocks. A luxury carmaker has also indicated interest in this audience. The RTB system matches these advertisers with the user profile and they bid on the ad. Whoever has the highest bid wins, and their ad gets served.
Of course, all this happens in the blink of an eye. Advertisers don’t literally sit and bid on individual ads. Like Google AdWords, they set maximum bids and budgets. The user criteria can also be very complex, taking into account everything from very detailed behavioral profiles to conversion data.
The amount of ads sold through RTB is still relatively low percentage of the overall $26 billion US online advertising market. However, a recent study from Forrester predicted that RTB spending will increase 130% from 2010 to $823 million in 2011.
As a relative newcomer to the online advertising space, I’m constantly running across new terms and jargon. So I’m starting a new series here on the Roar of the Crowd blog: Crowd Science Explainer. If you’d like to keep up with future posts, subscribe to our RSS feed. And be sure add to the comments or tweet me at @crowdscience if you have a term you’d like explained!
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11 Responses to What is Real-Time Bidding (RTB)?
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Hi Carlos, thanks for your question. I am not aware of any studies that analyze this. I think that like Google AdWords optimization, there are as many techniques and systems as there are users. With the industry continuing change and grow, there probably isn’t a perfect system yet.
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Hi Vivek, thank you! I’m glad you find our blog useful. If there are other topics you’d be interested in reading about, let us know.
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Your articles are really very useful for a beginner like me. Thank you so much!!
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Hi Matthew, thanks for your comment! To answer your question, RTBs are usually used for bidding on ad impressions rather than CPC – cost per click – ads. Advertisers bid per impression, which means displaying an ad on a webpage during one pageview.
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Thanks for ur article, I’d like to know RTB system’s only used in CPC ads.
Could u let me know?-
hi matthew,
we are working on a cpc-based RTB system. but only in europe. but are actually busy in extending our regional presence….
cheers
frank
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Pingback: Top 10 Advertising Buzzwords Every Developer Should Know | Judewa
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RTB spending will increase more than 200% in USA, in Germany more than 250%
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Thanks for the additional insight, Eric. What’s the source for your stats? I’d be interested in reading more.
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Pingback: Mobile Advertising – Demand Side Platforms (DSP/RTB) | Judewa
Carlos Azevedo
Hi Alexia, thanks for the terrific article!
I’d be interested in learning how much of the RTB platforms actually rely on optimization tools for reaching the best bidding strategies. Are you aware of any studies analysing the impact of optimizing bidding strategies on ROI/conversion rates? Would this impact be significant (if any at all)? Thanks for your valuable insights!