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
137 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
423 awarded
First bounty you offer on another person's question
52 awarded
Question score of 10 or more
3k awarded
Question with 1,000 views
7.8k awarded
First bounty you offer on your own question
215 awarded
Ask a question and accept an answer
7.6k awarded
First question with score of 1 or more
12.9k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
474 awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
204 awarded
Answer score of 10 or more
5.4k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
448 awarded
Answer your own question with score of 3 or more
140 awarded
Answer a question with score of 1 or more
7.3k awarded

Participation Badges

Complete "About Me" section of user profile
30.7k 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
2.1k awarded
Earn at least 200 reputation (the daily maximum) in a single day
316 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
291 awarded
Post 10 messages, with 1 or more starred, in chat
182 awarded

Tag Badges

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

Moderation Badges

First flagged post
1.9k awarded
First rollback
94 awarded
First down vote
1.8k awarded
Complete at least one review task. This badge is awarded once per review type
1.5k awarded
Delete own post with score of 3 or higher
48 awarded
First edit
8.3k awarded
Edit first post that was inactive for 6 months
497 awarded
First retag
423 awarded
Delete own post with score of -3 or lower
304 awarded
Approve or reject 100 suggested edits
32 awarded
Use 30 votes in a day
207 awarded
First up vote
24.6k awarded
First approved tag synonym
6 awarded
First tag wiki edit
117 awarded
Use the maximum 40 votes in a day
138 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
4.1k awarded