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
20 awarded
First bounty you manually award on your own question
34 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
120 awarded
First bounty you offer on another person's question
26 awarded
Question score of 10 or more
1.2k awarded
Question with 1,000 views
1.2k awarded
First bounty you offer on your own question
63 awarded
Ask a question and accept an answer
1.1k awarded
First question with score of 1 or more
2k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
19 awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
64 awarded
Answer score of 10 or more
1.7k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
375 awarded
Answer your own question with score of 3 or more
61 awarded
Answer a question with score of 1 or more
1.6k awarded

Participation Badges

Complete "About Me" section of user profile
4.7k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
Leave 10 comments
497 awarded
Earn at least 200 reputation (the daily maximum) in a single day
43 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
32 awarded
One post with score of 2 on meta
190 awarded
Post 10 messages, with 1 or more starred, in chat
16 awarded

Tag Badges

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

Moderation Badges

First flagged post
513 awarded
First rollback
47 awarded
First down vote
573 awarded
Complete at least one review task. This badge is awarded once per review type
687 awarded
Delete own post with score of 3 or higher
28 awarded
First edit
1.5k awarded
Edit first post that was inactive for 6 months
123 awarded
First retag
162 awarded
Delete own post with score of -3 or lower
62 awarded
Approve or reject 100 suggested edits
10 awarded
Use 30 votes in a day
70 awarded
First up vote
3.4k awarded
First approved tag synonym
8 awarded
First tag wiki edit
56 awarded
Use the maximum 40 votes in a day
44 awarded

Other Badges

Visited every section of the FAQ (retired)
70 awarded
Share a link to a question later visited by 25 unique IP addresses
13 awarded
Read the entire tour page
702 awarded