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 award on another person's question
2 awarded
First bounty you manually award on your own question
12 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
258 awarded
First bounty you offer on another person's question
7 awarded
Question score of 10 or more
330 awarded
Question with 1,000 views
150 awarded
First bounty you offer on your own question
30 awarded
Ask a question and accept an answer
625 awarded
First question with score of 1 or more
1.1k awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
49 awarded
Answer score of 10 or more
437 awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
120 awarded
Answer your own question with score of 3 or more
186 awarded
Answer a question with score of 1 or more
515 awarded

Participation Badges

Complete "About Me" section of user profile
825 awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
66 awarded
Leave 10 comments
290 awarded
Earn at least 200 reputation (the daily maximum) in a single day
22 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
46 awarded
One post with score of 2 on meta
54 awarded
Post 10 messages, with 1 or more starred, in chat
2 awarded

Tag Badges

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

Moderation Badges

First flagged post
66 awarded
First rollback
8 awarded
First down vote
171 awarded
Complete at least one review task. This badge is awarded once per review type
317 awarded
Delete own post with score of 3 or higher
8 awarded
First edit
634 awarded
Edit first post that was inactive for 6 months
34 awarded
First retag
67 awarded
Delete own post with score of -3 or lower
11 awarded
Approve or reject 100 suggested edits
3 awarded
Use 30 votes in a day
30 awarded
First up vote
622 awarded
First approved tag synonym
4 awarded
First tag wiki edit
28 awarded
Use the maximum 40 votes in a day
23 awarded

Other Badges

Share a link to a question later visited by 25 unique IP addresses
12 awarded
Read the entire tour page
349 awarded

Retired Badges

Visited every section of the FAQ
28 awarded
Asked a question with zero score, no answers, no comments, and low views for a week
34 awarded