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
28 awarded
First bounty you manually award on your own question
151 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
463 awarded
First bounty you offer on another person's question
55 awarded
Question score of 10 or more
3.4k awarded
Question with 1,000 views
8.6k awarded
First bounty you offer on your own question
240 awarded
Ask a question and accept an answer
8.3k awarded
First question with score of 1 or more
14.2k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
563 awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
230 awarded
Answer score of 10 or more
6.1k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
526 awarded
Answer your own question with score of 3 or more
151 awarded
Answer a question with score of 1 or more
7.8k awarded

Participation Badges

Complete "About Me" section of user profile
34.1k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
1.3k awarded
Leave 10 comments
2.4k awarded
Earn at least 200 reputation (the daily maximum) in a single day
387 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
80 awarded
One post with score of 2 on meta
325 awarded
Post 10 messages, with 1 or more starred, in chat
201 awarded

Tag Badges

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

Moderation Badges

First flagged post
2.2k awarded
First rollback
109 awarded
First down vote
2k awarded
Complete at least one review task. This badge is awarded once per review type
1.8k awarded
Delete own post with score of 3 or higher
53 awarded
First edit
9.2k awarded
Edit first post that was inactive for 6 months
564 awarded
First retag
458 awarded
Delete own post with score of -3 or lower
365 awarded
Approve or reject 100 suggested edits
38 awarded
Use 30 votes in a day
235 awarded
First up vote
27.1k awarded
First approved tag synonym
8 awarded
First tag wiki edit
128 awarded
Use the maximum 40 votes in a day
160 awarded

Other Badges

Visited every section of the FAQ (retired)
445 awarded
Share a link to a question later visited by 25 unique IP addresses
1.8k awarded
Read the entire tour page
5.1k awarded