Brave's Shields feature blocks trackers and advertisement by default. You can check the "block scripts" setting as well to block scripts from running by default but that will lead to breakage and you having to create overrides for sites that don't work properly if JavaScript is disabled. Note that the feature is not as advanced as the blocking of scripts by NoScript or uMatrix.
Social Media Blocking-- Unless you use any of those openly, disable all options here:
- Allow Google login buttons on third-party sites.
- Allow Facebook logins and embedded posts.
- Allow Twitter embedded tweets.
- Allow LinkedIn embedded posts.
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Extensions -- Depends on your usage. Disable "WebTorrent", "Hangouts", and "IPFS Companion" if you don't use these.
