https://support.brave.com/hc/en-us/articles/4409406835469-What-is-the-Web-Discovery-Project-
If you opt in, you’ll contribute some anonymous data about searches and web page visits made within the Brave Browser (including pages arrived at via some, but not all, other search engines). This data helps build the Brave Search independent index, and ensure we show results relevant to your search queries. By “data” we mean search queries, search result clicks, the URLs of pages visited in the browser, time spent on those pages, and some metadata about the pages themselves.
My emphasis.




My reply was purely to get to the accurate information versus your reply which says that they are “collecting data from their search engine not the browser” as it’s important that people reading know what’s actually going on.
I’m not here to argue about whether they should or should not do that and I’m not going to (and when I used Brave I consciously went into the menu to opt into this to improve their search engine so we could have a competitor).