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
34 awarded
First bounty you manually awarded on your own question
151 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
1.1k awarded
First bounty you offered on another person's question
55 awarded
Question score of 10 or more
1.3k awarded
Asked a question with 1,000 views
6k awarded
First bounty you offered on your own question
320 awarded
Asked a question and accepted an answer
5.6k awarded
Asked first question with score of 1 or more
13.3k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
2.1k awarded

Answer Badges

Edited and answered 1 question (both actions within 12 hours, answer score > 0)
203 awarded
Answer score of 10 or more
1.5k awarded
Answered more than 30 days later as first answer scoring 2 or more
889 awarded
Answered your own question with score of 3 or more
410 awarded
Answered first question with score of 1 or more
5.4k awarded

Participation Badges

Completed "About Me" section of user profile
7.1k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
969 awarded
Left 10 comments
1.9k awarded
Earned at least 200 reputation (the daily maximum) in a single day
36 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
89 awarded
One post with score of 2 on meta
259 awarded
Posted 10 messages, with 1 or more starred, in chat
32 awarded

Tag Badges

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

Moderation Badges

First flagged post
452 awarded
First rollback
65 awarded
First down vote
731 awarded
Completed at least one review task. This badge is awarded once per review type
1k awarded
Deleted own post with score of 3 or higher
39 awarded
First edit
6.5k awarded
Edited first post that was inactive for 6 months
303 awarded
First retag
426 awarded
Deleted own post with score of -3 or lower
46 awarded
Approved or rejected 100 suggested edits
34 awarded
Used 30 votes in a day
124 awarded
First up vote
6.7k awarded
First approved tag synonym
13 awarded
First tag wiki edit
156 awarded
Used the maximum 40 votes in a day
79 awarded

Other Badges

Visited every section of the FAQ (retired)
310 awarded
Shared a link to a question that was visited by 25 unique IP addresses
129 awarded
Read the entire tour page
1.5k awarded