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
26 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
326 awarded
First bounty you offer on another person's question
91 awarded
Question score of 10 or more
1k awarded
Question with 1,000 views
6.1k awarded
First bounty you offer on your own question
345 awarded
Ask a question and accept an answer
4k awarded
First question with score of 1 or more
9.4k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
1.7k awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
94 awarded
Answer score of 10 or more
1k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
1.1k awarded
Answer your own question with score of 3 or more
270 awarded
Answer a question with score of 1 or more
7.3k awarded

Participation Badges

Complete "About Me" section of user profile
25.6k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
696 awarded
Leave 10 comments
670 awarded
Earn at least 200 reputation (the daily maximum) in a single day
50 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
99 awarded
One post with score of 2 on meta
263 awarded
Post 10 messages, with 1 or more starred, in chat
25 awarded

Tag Badges

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

Moderation Badges

First flagged post
1.2k awarded
First rollback
69 awarded
First down vote
971 awarded
Complete at least one review task. This badge is awarded once per review type
557 awarded
Delete own post with score of 3 or higher
29 awarded
First edit
4.1k awarded
Edit first post that was inactive for 6 months
366 awarded
First retag
304 awarded
Delete own post with score of -3 or lower
117 awarded
Approve or reject 100 suggested edits
15 awarded
Use 30 votes in a day
115 awarded
First up vote
15k awarded
First approved tag synonym
9 awarded
First tag wiki edit
96 awarded
Use the maximum 40 votes in a day
62 awarded

Other Badges

Visited every section of the FAQ (retired)
308 awarded
Share a link to a question later visited by 25 unique IP addresses
224 awarded
Read the entire tour page
2.4k awarded