StackOverflow Badges

Stack Overflow is a question and answer site for professional and enthusiast programmers.

It’s the place where developers get help when facing problems in programming. StackOverflow reputation is a rough measurement of how much the community trusts you; it is earned by convincing your peers that you know what you’re talking about. The more reputation you earn, the more privileges you gain and the more tools you'll have access to. The net score is the total number of upvotes on your answer, minus the total number of downvotes on the same.

https://stackoverflow.com/help/whats-reputation