Besides gaining reputation with your questions and answers, you receive badges for being especially helpful. Badges appear on your profile page, flair, and your posts.
Question Badges
Asked a well-received question on 5 separate days, and maintained a positive question record
22 awarded
Asked a well-received question on 30 separate days, and maintained a positive question record
Asked a well-received question on 100 separate days, and maintained a positive question record
Asked a question with no votes, no answers, no comments, and low views for a week
91 awarded
Answer Badges
Edited and answered 1 question (both actions within 12 hours, answer score > 0)
21 awarded
Highest scoring answer that outscored an accepted answer with score of more than 10 by more than 2x
Participation Badges
Visited an election during any phase of an active election and had enough reputation to cast a vote
Followed the Area 51 proposal for this site before it entered the commitment phase
78 awarded
Voted 10 times, added 3 posts score > 0, and visited the site on 3 separate days during the private beta
Tag Badges
You must have a total score of 100 in at least 20 non-community wiki answers to achieve this badge.
3 awarded
You must have a total score of 400 in at least 80 non-community wiki answers to achieve this badge.
You must have a total score of 1000 in at least 200 non-community wiki answers to achieve this badge.
Moderation Badges
Completed at least one review task. This badge is awarded once per review type
162 awarded