So the ads you see are just based on country, type of device (windows,linux,macos,android or ios), and your search term, which is the minimum you really need for relevance. But these are not kept in any sort of tracking profile and Brave doesn't know anything about you, or queries across sessions. And unlike most of the search engines out there right now, we are motivated to ensure that the ads do not become a mess that buries organic results.

Why is type of device needed for relevance? I can think of specific searches where maybe it could matter, but generally I don't think it does.

Says at least something about socioeconomic status. Although I think less than one might imagine.