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
15 awarded
First bounty you manually awarded on your own question
48 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
190 awarded
First bounty you offered on another person's question
36 awarded
Question score of 10 or more
1.1k awarded
Asked a question with 1,000 views
256 awarded
First bounty you offered on your own question
72 awarded
Asked a question and accepted an answer
521 awarded
Asked first question with score of 1 or more
1.2k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
20 awarded

Answer Badges

Answer score of 10 or more
1.1k awarded
Answered more than 30 days later as first answer scoring 2 or more
520 awarded
Answered your own question with score of 3 or more
86 awarded
Answered first question with score of 1 or more
1k awarded

Participation Badges

Completed all user profile fields
592 awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
90 awarded
Left 10 comments
367 awarded
Earned at least 200 reputation (the daily maximum) in a single day
49 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
141 awarded
Posted 10 messages, with 1 or more starred, in chat
72 awarded

Tag Badges

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

Moderation Badges

First flagged post
159 awarded
First rollback
54 awarded
First down vote
298 awarded
Completed at least one review task. This badge is awarded once per review type
256 awarded
Deleted own post with score of 3 or higher
25 awarded
First edit
744 awarded
Edited first post that was inactive for 6 months
93 awarded
First retag
99 awarded
Deleted own post with score of -3 or lower
39 awarded
Approved or rejected 100 suggested edits
7 awarded
Used 30 votes in a day
52 awarded
First up vote
968 awarded
First approved tag synonym
10 awarded
First tag wiki edit
44 awarded
Used the maximum 40 votes in a day
30 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
47 awarded
Read the entire about page
194 awarded