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
14 awarded
First bounty you manually awarded on your own question
34 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
140 awarded
First bounty you offered on another person's question
25 awarded
Question score of 10 or more
375 awarded
Asked a question with 1,000 views
423 awarded
First bounty you offered on your own question
61 awarded
Asked a question and accepted an answer
1.1k awarded
Asked first question with score of 1 or more
1.9k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
74 awarded

Answer Badges

Answer score of 10 or more
445 awarded
Answered more than 30 days later as first answer scoring 2 or more
251 awarded
Answered your own question with score of 3 or more
45 awarded
Answered first question with score of 1 or more
883 awarded

Participation Badges

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

Tag Badges

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

Moderation Badges

First flagged post
188 awarded
First rollback
29 awarded
First down vote
236 awarded
Completed at least one review task. This badge is awarded once per review type
362 awarded
Deleted own post with score of 3 or higher
10 awarded
First edit
1k awarded
Edited first post that was inactive for 6 months
60 awarded
First retag
117 awarded
Deleted own post with score of -3 or lower
19 awarded
Approved or rejected 100 suggested edits
3 awarded
Used 30 votes in a day
34 awarded
First up vote
1.8k awarded
First approved tag synonym
3 awarded
First tag wiki edit
43 awarded
Used the maximum 40 votes in a day
25 awarded

Other Badges

Visited every section of the FAQ (retired)
70 awarded
Shared a link to a question that was visited by 25 unique IP addresses
26 awarded
Read the entire about page
201 awarded