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
30 awarded
First bounty you manually awarded on your own question
41 awarded
First bounty you offered on another person's question
34 awarded
Question score of 10 or more
1k awarded
Asked a question with 1,000 views
933 awarded
First bounty you offered on your own question
50 awarded
Asked a question and accepted an answer
578 awarded
Asked first question with score of 1 or more
1k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
8 awarded

Answer Badges

Answer score of 10 or more
1.2k awarded
Answered more than 30 days later as first answer scoring 2 or more
70 awarded
Answered your own question with score of 3 or more
42 awarded
Answered first question with score of 1 or more
1.5k awarded

Participation Badges

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

Tag Badges

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

Moderation Badges

First flagged post
280 awarded
First rollback
59 awarded
First down vote
430 awarded
Completed at least one review task. This badge is awarded once per review type
317 awarded
Deleted own post with score of 3 or higher
22 awarded
First edit
1k awarded
Edited first post that was inactive for 6 months
66 awarded
First retag
113 awarded
Deleted own post with score of -3 or lower
48 awarded
Approved or rejected 100 suggested edits
6 awarded
Used 30 votes in a day
67 awarded
First up vote
1.7k awarded
First approved tag synonym
12 awarded
First tag wiki edit
57 awarded
Used the maximum 40 votes in a day
42 awarded

Other Badges

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