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That's not how it works. It's hierarchical. Someone with an ad to show doesn't send the ad to the web site that wants to show the ad. Instead it just tells that
by yuliyp 5y ago
That's not how it works. It's hierarchical. Someone with an ad to show doesn't send the ad to the web site that wants to show the ad. Instead it just tells that web site "I'll pay $.005 if you show my ad", then if it wins it serves the ad it wants to show. There's no time at that realtime auction to do analysis. The ad doesn't even need to exist as a fixed thing. It can be dynamically generated tailored to the specific user (think of "Come back and shop with us" ads where they show you things you've looked at).
- Supermancho 5y ago> Someone with an ad to show doesn't send the ad to the web site that wants to show the ad In fact, they do. Creative review is part of most ad platforms. Contextual categorization isn't possible without knowing what the ad is about (and the content it's going to), to various degree.
- lupire 5y agoThey don't screen the actual code that ships at auction time.
- tgsovlerkhgsel 5y agoThere is a lot more middlemen involved... and at any point they could make a rule that you can only use a certain set of HTML tags and image formats for your ads (none of which include scripts of course). That would prevent not only most exploits (especially once you re-encode the images), but also simple badly written ads that drive up CPU usage. But it's easier, and allows more middlemen, to simply allow the next party to hand you arbitrary code that may or may not be put into an iframe that may or may not be sandboxed.