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

First bounty you manually awarded on another person's question
45 awarded
First bounty you manually awarded on your own question
64 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
388 awarded
First bounty you offered on another person's question
56 awarded
Question score of 10 or more
3.3k awarded
Asked a question with 1,000 views
2.9k awarded
First bounty you offered on your own question
78 awarded
Asked a question and accepted an answer
2k awarded
Asked first question with score of 1 or more
3k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
4 awarded

Answer Badges

Edited and answered 1 question (both actions within 12 hours, answer score > 0)
121 awarded
Answer score of 10 or more
6.2k awarded
Answered more than 30 days later as first answer scoring 2 or more
108 awarded
Answered your own question with score of 3 or more
164 awarded
Answered first question with score of 1 or more
3k awarded

Participation Badges

Completed "About Me" section of user profile
5k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
138 awarded
Left 10 comments
842 awarded
Earned at least 200 reputation (the daily maximum) in a single day
172 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
43 awarded
One post with score of 2 on meta
326 awarded
Posted 10 messages, with 1 or more starred, in chat
169 awarded

Tag Badges

You must have a total score of 100 in at least 20 non-community wiki answers to achieve this badge.
242 awarded

Moderation Badges

First flagged post
434 awarded
First rollback
74 awarded
First down vote
829 awarded
Completed at least one review task. This badge is awarded once per review type
739 awarded
Deleted own post with score of 3 or higher
51 awarded
First edit
2.1k awarded
Edited first post that was inactive for 6 months
172 awarded
First retag
294 awarded
Deleted own post with score of -3 or lower
136 awarded
Approved or rejected 100 suggested edits
13 awarded
Used 30 votes in a day
125 awarded
First up vote
4.5k awarded
First approved tag synonym
15 awarded
First tag wiki edit
145 awarded
Used the maximum 40 votes in a day
58 awarded

Other Badges

Visited every section of the FAQ (retired)
204 awarded
Shared a link to a question that was visited by 25 unique IP addresses
107 awarded
Read the entire tour page
1k awarded