When Extrovert drafts a comment for a post, you review it in your feed and choose what to do. Here is what each button does.
Approve
Approve posts the comment. Extrovert publishes the drafted comment on the post, and by default also likes the post.
Skip and react
Skip and react does not post the comment. It only leaves a like (a reaction) on the post. Use it when you want to acknowledge a post without commenting. This is the button people most often mix up, so to be clear: it reacts, it does not comment.
Skip
Skip passes on the post entirely. No comment and no like. The post moves to your Skipped tab, where you can bring it back later with Move back for approval if you change your mind.
Improve draft
Improve draft lets you adjust the AI comment before posting. You can regenerate it for a fresh version, or give instructions to change the tone or length or add a point. When you are happy with it, Approve it.
Quick summary
Approve: the comment is posted (plus a like by default)
Skip and react: no comment, just a like
Skip: nothing happens, the post moves to Skipped
Improve draft: edit or regenerate the draft first, then Approve