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
43 awarded
First bounty you offered on another person's question
32 awarded
Question score of 10 or more
1k awarded
Asked a question with 1,000 views
209 awarded
First bounty you offered on your own question
66 awarded
Asked a question and accepted an answer
479 awarded
Asked first question with score of 1 or more
1.1k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
17 awarded

Answer Badges

Answer score of 10 or more
1k awarded
Answered more than 30 days later as first answer scoring 2 or more
454 awarded
Answered your own question with score of 3 or more
78 awarded
Answered first question with score of 1 or more
927 awarded

Participation Badges

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

Tag Badges

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

Moderation Badges

First flagged post
145 awarded
First rollback
50 awarded
First down vote
274 awarded
Completed at least one review task. This badge is awarded once per review type
219 awarded
Deleted own post with score of 3 or higher
22 awarded
First edit
674 awarded
Edited first post that was inactive for 6 months
82 awarded
First retag
94 awarded
Deleted own post with score of -3 or lower
35 awarded
Approved or rejected 100 suggested edits
5 awarded
Used 30 votes in a day
47 awarded
First up vote
874 awarded
First approved tag synonym
10 awarded
First tag wiki edit
40 awarded
Used the maximum 40 votes in a day
27 awarded

Other Badges

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