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
13 awarded
First bounty you manually award on your own question
27 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
136 awarded
First bounty you offer on another person's question
18 awarded
Question score of 10 or more
2.2k awarded
Question with 1,000 views
2.3k awarded
First bounty you offer on your own question
31 awarded
Ask a question and accept an answer
1k awarded
First question with score of 1 or more
1.7k awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
67 awarded
Answer score of 10 or more
3k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
223 awarded
Answer your own question with score of 3 or more
127 awarded
Answer a question with score of 1 or more
2.5k awarded

Participation Badges

Complete "About Me" section of user profile
6.7k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
Leave 10 comments
440 awarded
Earn at least 200 reputation (the daily maximum) in a single day
121 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
63 awarded
One post with score of 2 on meta
171 awarded
Post 10 messages, with 1 or more starred, in chat
47 awarded

Tag Badges

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

Moderation Badges

First flagged post
505 awarded
First rollback
32 awarded
First down vote
472 awarded
Complete at least one review task. This badge is awarded once per review type
733 awarded
Delete own post with score of 3 or higher
17 awarded
First edit
1.5k awarded
Edit first post that was inactive for 6 months
159 awarded
First retag
160 awarded
Delete own post with score of -3 or lower
22 awarded
Approve or reject 100 suggested edits
12 awarded
Use 30 votes in a day
84 awarded
First up vote
4.8k awarded
First approved tag synonym
6 awarded
First tag wiki edit
73 awarded
Use the maximum 40 votes in a day
58 awarded

Other Badges

Share a link to a post later visited by 25 unique IP addresses
57 awarded
Read the entire tour page
967 awarded

Retired Badges

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