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
26 awarded
First bounty you manually awarded on your own question
116 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
468 awarded
First bounty you offered on another person's question
33 awarded
Question score of 10 or more
637 awarded
Asked a question with 1,000 views
5.2k awarded
First bounty you offered on your own question
202 awarded
Asked a question and accepted an answer
6.2k awarded
Asked first question with score of 1 or more
9k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
942 awarded

Answer Badges

Answer score of 10 or more
1.3k awarded
Answered more than 30 days later as first answer scoring 2 or more
439 awarded
Answered your own question with score of 3 or more
193 awarded
Answered first question with score of 1 or more
4k awarded

Participation Badges

Completed all user profile fields
8.2k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
586 awarded
Left 10 comments
1.3k awarded
Earned at least 200 reputation (the daily maximum) in a single day
40 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
65 awarded
One post with score of 2 on meta
192 awarded
Posted 10 messages, with 1 or more starred, in chat
102 awarded

Tag Badges

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

Moderation Badges

First flagged post
584 awarded
First rollback
59 awarded
First down vote
603 awarded
Completed at least one review task. This badge is awarded once per review type
877 awarded
Deleted own post with score of 3 or higher
36 awarded
First edit
5.6k awarded
Edited first post that was inactive for 6 months
178 awarded
First retag
295 awarded
Deleted own post with score of -3 or lower
87 awarded
Approved or rejected 100 suggested edits
16 awarded
Used 30 votes in a day
84 awarded
First up vote
10.4k awarded
First approved tag synonym
12 awarded
First tag wiki edit
98 awarded
Used the maximum 40 votes in a day
50 awarded

Other Badges

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