For example if I wish to track how many posts have I edited.
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
They're not supposed to be hidden; you can find various numbers regarding your actions on your user page, for instance edits.
Of course, there's all sorts of information that isn't directly exposed anywhere. For these, you can dig in with the Stack Exchange Data Explorer.
An easy way that I use is: