Which branch am I / should I be tracking? beta or tests-passed or main?

So I think I misunderstood the terminology here.

I thought that beta versions are more frequent, with more commits and after x amount of commits there’s a merge to the tests-passed branch, meaning all previous commit are “verified”.

I just want to make sure I’m up to date with recent features, though not at the cost of having a (potentially) buggy version..