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
19 awarded
First bounty you manually awarded on your own question
53 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
204 awarded
First bounty you offered on another person's question
40 awarded
Question score of 10 or more
1.2k awarded
Asked a question with 1,000 views
336 awarded
First bounty you offered on your own question
84 awarded
Asked a question and accepted an answer
570 awarded
Asked first question with score of 1 or more
1.4k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
25 awarded

Answer Badges

Edited and answered 1 question (both actions within 12 hours, answer score > 0)
78 awarded
Answer score of 10 or more
1.3k awarded
Answered more than 30 days later as first answer scoring 2 or more
574 awarded
Answered your own question with score of 3 or more
94 awarded
Answered first question with score of 1 or more
1.1k awarded

Participation Badges

Completed "About Me" section of user profile
1.2k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
90 awarded
Left 10 comments
391 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
36 awarded
One post with score of 2 on meta
149 awarded
Posted 10 messages, with 1 or more starred, in chat
74 awarded

Tag Badges

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

Moderation Badges

First flagged post
178 awarded
First rollback
57 awarded
First down vote
321 awarded
Completed at least one review task. This badge is awarded once per review type
292 awarded
Deleted own post with score of 3 or higher
27 awarded
First edit
822 awarded
Edited first post that was inactive for 6 months
97 awarded
First retag
105 awarded
Deleted own post with score of -3 or lower
45 awarded
Approved or rejected 100 suggested edits
9 awarded
Used 30 votes in a day
55 awarded
First up vote
1.1k awarded
First approved tag synonym
10 awarded
First tag wiki edit
44 awarded
Used the maximum 40 votes in a day
34 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
49 awarded
Read the entire tour page
232 awarded