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
60 awarded
First bounty you manually awarded on your own question
253 awarded
Asked a well-received question on 5 separate days, and maintained a positive question record
603 awarded
First bounty you offered on another person's question
90 awarded
Question score of 10 or more
7.4k awarded
Asked a question with 1,000 views
11.7k awarded
First bounty you offered on your own question
401 awarded
Asked a question and accepted an answer
12.3k awarded
Asked first question with score of 1 or more
17.9k awarded
Asked a question with no votes, no answers, no comments, and low views for a week
657 awarded

Answer Badges

Edited and answered 1 question (both actions within 12 hours, answer score > 0)
304 awarded
Answer score of 10 or more
20k awarded
Answered more than 30 days later as first answer scoring 2 or more
509 awarded
Answered your own question with score of 3 or more
211 awarded
Answered first question with score of 1 or more
19.5k awarded

Participation Badges

Completed "About Me" section of user profile
55.2k awarded
Visited an election during any phase of an active election and had enough reputation to cast a vote
2.9k awarded
Left 10 comments
5.6k awarded
Earned at least 200 reputation (the daily maximum) in a single day
1.2k awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
69 awarded
One post with score of 2 on meta
831 awarded
Posted 10 messages, with 1 or more starred, in chat
168 awarded

Tag Badges

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

Moderation Badges

First flagged post
3.7k awarded
First rollback
288 awarded
First down vote
5.2k 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
124 awarded
First edit
16.1k awarded
Edited first post that was inactive for 6 months
902 awarded
First retag
970 awarded
Deleted own post with score of -3 or lower
1.4k awarded
Approved or rejected 100 suggested edits
36 awarded
Used 30 votes in a day
528 awarded
First up vote
44.4k awarded
First approved tag synonym
24 awarded
First tag wiki edit
270 awarded
Used the maximum 40 votes in a day
152 awarded

Other Badges

Visited every section of the FAQ (retired)
1.2k awarded
Shared a link to a question that was visited by 25 unique IP addresses
1.4k awarded
Read the entire tour page
5.2k awarded