I was looking in my profile, and I saw the 'Helpful Flag' thing with a number beside of it. I know it's not the number of upvoted questions or answers, because my number for both of these are higher. Are these the number of upvotes on comments that I have recieved?
When you see a question or answer, you may notice a row of buttons under the answer/questions content. Most commonly you see Edit and Flag
When you press flag, it gives you some options for why the question or answer requires a moderators attention. You choose one, and submit.
If your flag is valid and there was a problem, a moderator will mark it as Helpful. If not, it will be declined. Your profile contains the total number of helpful flags (only visible to you and mods). Clicking the number will show you everything you flagged, along with some stats on how many were helpful, or not.