Interesting. So the browser knows your browsing history like every browser does, but it uses it to share some distilled data. Yeah, I definitely don't want that. Looks like I already totally disabled it though, so I'm good I guess.
Privacy and security > Ad privacy
Ad topics: Generates a list of your interests based on your browsing behavior.
Site-suggested ads: Allows advertisers to retarget you based on your interactions.
Ad measurement: Enables advertisers to assess ad performance.
Toggle each of these settings to "Off" to disable them.