Did you ever think, why do I keep seeing ads of things I’m actually interested in? You’re not the only one. Behind the scenes, complex systems of data analytics and advertisement auctions are working hard to make you buy products or services that you are probably interested in.
How do online advertising auctions work?
When loading a web page, an extremely quick auction is taking place behind the scenes. In this auction, the highest bidder wins, and their ad will be shown to you. This is all based on complex algorithms that analyse data like your browsing history, device type and location. Companies like Meta also use data like likes and shares to determine your interests. When looking at the pricing system, Google for instance, uses a bidding system called “generalized second-price”, or GSP. With this bidding system, “each advertiser pays the next highest advertiser’s bid” (Edelman, Ostrovsky & Schwarz, 2007). Usually, companies bid on certain keywords for Google ads. This means that if you search “curtains” for instance, that the highest bidder for that keyword will be shown at the top of the results.
The price of personalization
While auctions for personalized advertisements make ads more relevant for users and help companies generate more revenue through their ads, they also come with great concerns about data privacy. It might be a bit scary to see ads about subjects that you just talked about 5 minutes ago. But also, how can you still be aware about what data is being used and for what? For users, transparency about this topic is becoming more and more important.
My take: is the system sustainable?
This discussion is a tricky one. I think it is very important that targeted ads keep existing. They are a very important revenue stream for companies like Google and Meta, which will eventually be used to improve the functionality of the platform. However, one of my main concerns is the so called “filter bubble” effect. This effect means that people’s existing opinions on certain topics will be continually reinforced, without exposure to different viewpoints. In my opinion, this is a very dangerous development, since this might lead to increasingly extreme opinions. Therefore, I think it is very important that the market for online advertising auctions stays regulated by governments, in order to prevent this development from escalating.
References
Edelman, B., Ostrovsky, M., & Schwarz, M. (2007). Internet advertising and the generalized second-price auction: Selling billions of dollars worth of keywords. American economic review, 97(1), 242-259.