PPA is about attribution. It doesn't determine ad types you're seeing like Google's Topics. What it's for is having an allegedly private way to determine if you

PPA is about attribution. It doesn't determine ad types you're seeing like Google's Topics. What it's for is having an allegedly private way to determine if you actually bought a product based on an ad you've seen. Marketeers love having that data so they can determine if their ads are effective to trigger purchases (called "conversions") I'm not in favour of PPA by the way. I turned it off everywhere. But I just wanted to highlight this.