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
51 awarded
First bounty you manually awarded on your own question
113 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
711 awarded
First bounty you offered on another person's question
63 awarded
Question score of 10 or more
4k awarded
Asked a question with 1,000 views
16.6k awarded
First bounty you offered on your own question
147 awarded
Asked a question and accepted an answer
12.1k awarded
Asked first question with score of 1 or more
17.4k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
39 awarded

Answer Badges

Edited and answered 1 question (both actions within 12 hours, answer score > 0)
385 awarded
Answer score of 10 or more
10.2k awarded
Answered more than 30 days later as first answer scoring 2 or more
293 awarded
Answered your own question with score of 3 or more
157 awarded
Answered first question with score of 1 or more
13.2k awarded

Participation Badges

Completed "About Me" section of user profile
27.1k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
1.8k awarded
Left 10 comments
3.3k awarded
Earned at least 200 reputation (the daily maximum) in a single day
595 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
67 awarded
One post with score of 2 on meta
659 awarded
Posted 10 messages, with 1 or more starred, in chat
231 awarded

Tag Badges

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

Moderation Badges

First flagged post
2k awarded
First rollback
245 awarded
First down vote
2.8k awarded
Completed at least one review task. This badge is awarded once per review type
1.9k awarded
Deleted own post with score of 3 or higher
85 awarded
First edit
10.1k awarded
Edited first post that was inactive for 6 months
396 awarded
First retag
548 awarded
Deleted own post with score of -3 or lower
336 awarded
Approved or rejected 100 suggested edits
48 awarded
Used 30 votes in a day
321 awarded
First up vote
23.8k awarded
First approved tag synonym
21 awarded
First tag wiki edit
112 awarded
Used the maximum 40 votes in a day
167 awarded

Other Badges

Visited every section of the FAQ (retired)
487 awarded
Shared a link to a question that was visited by 25 unique IP addresses
131 awarded
Read the entire tour page
3.9k awarded