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
157 awarded
First bounty you manually award on your own question
332 awarded
Ask a good question on 5 separate days, and maintain a positive question record
1.3k awarded
First bounty you offer on another person's question
209 awarded
Question score of 10 or more
6.9k awarded
Question with 1,000 views
29.2k awarded
First bounty you offer on your own question
538 awarded
Ask a question and accept an answer
8.3k awarded
First question with score of 1 or more
15.1k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
1.4k awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
478 awarded
Answer score of 10 or more
9.1k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
2k awarded
Answer your own question with score of 3 or more
993 awarded
Answer a question with score of 1 or more
17.4k awarded

Participation Badges

Complete "About Me" section of user profile
21.3k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
2k awarded
Leave 10 comments
2.8k awarded
Earn at least 200 reputation (the daily maximum) in a single day
367 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
90 awarded
One post with score of 2 on meta
707 awarded
Post 10 messages, with 1 or more starred, in chat
415 awarded

Tag Badges

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

Moderation Badges

First flagged post
2.5k awarded
First rollback
367 awarded
First down vote
2.9k awarded
Complete at least one review task. This badge is awarded once per review type
2.6k awarded
Delete own post with score of 3 or higher
102 awarded
First edit
8.6k awarded
Edit first post that was inactive for 6 months
840 awarded
First retag
1k awarded
Delete own post with score of -3 or lower
559 awarded
Approve or reject 100 suggested edits
95 awarded
Use 30 votes in a day
553 awarded
First up vote
17.4k awarded
First approved tag synonym
23 awarded
First tag wiki edit
647 awarded
Use the maximum 40 votes in a day
365 awarded

Other Badges

Visited every section of the FAQ (retired)
808 awarded
Share a link to a question later visited by 25 unique IP addresses
526 awarded
Read the entire tour page
3.5k awarded