Re: [w3ctag/design-reviews] Review request for Protected Audience (Issue #723)

> We understand that Protected Audience is a substitute mechanism to enable ad targeting, specifically where targeting is based on specific actions that someone took on other sites. This use case was previously supported by cross-site cookies.
> 
> The TAG is supportive of efforts to improve web privacy, particularly the [withdrawal of cross-site cookies](https://www.w3.org/2001/tag/doc/web-without-3p-cookies/), 
> 
> We recognize that the web is not perfect. There are lots of ways that cross-site information still leaks, especially when it comes to navigation. But we do insist that new work [leaves the web in a better state than it was found](https://www.w3.org/TR/design-principles/#leave-the-web-better) - our goal as web platform developers acting in good faith is to patch these vulnerabilities, and not create new means of cross-site recognition.
> 
> If Protected Audience exists to support ad targeting based on cross-site information, it has to ensure that it does not enable cross-site recognition. 

Out of curiosity, was your baseline considered a situation with third-party cookies on or off? What's the standard situation on the Web today?



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