Development best practices - expression vs Inline queries and Git

We have a large number of snap pipelines inherited on a project and I wanted to ask for some best practices on maintaining those pipelines.

  • How much should we put in expression files? Should we put all of our queries in SQL snaps in expression queries or leave them inline?
  • We use Bitbucket for source controls? What is the best practices for checking in and out our code there?

Thanks!