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
48 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
183 awarded
First bounty you offer on another person's question
28 awarded
Question score of 10 or more
692 awarded
Question with 1,000 views
5.3k awarded
First bounty you offer on your own question
91 awarded
Ask a question and accept an answer
5.1k awarded
First question with score of 1 or more
7.8k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
477 awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
111 awarded
Answer score of 10 or more
1.2k awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
428 awarded
Answer your own question with score of 3 or more
175 awarded
Answer a question with score of 1 or more
4.8k awarded

Participation Badges

Complete "About Me" section of user profile
17.4k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
431 awarded
Leave 10 comments
765 awarded
Earn at least 200 reputation (the daily maximum) in a single day
60 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
47 awarded
One post with score of 2 on meta
194 awarded
Post 10 messages, with 1 or more starred, in chat
81 awarded

Tag Badges

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

Moderation Badges

First flagged post
618 awarded
First rollback
46 awarded
First down vote
554 awarded
Complete at least one review task. This badge is awarded once per review type
611 awarded
Delete own post with score of 3 or higher
14 awarded
First edit
4.6k awarded
Edit first post that was inactive for 6 months
216 awarded
First retag
201 awarded
Delete own post with score of -3 or lower
91 awarded
Approve or reject 100 suggested edits
17 awarded
Use 30 votes in a day
86 awarded
First up vote
11.2k awarded
First approved tag synonym
14 awarded
First tag wiki edit
72 awarded
Use the maximum 40 votes in a day
54 awarded

Other Badges

Visited every section of the FAQ (retired)
132 awarded
Share a link to a question later visited by 25 unique IP addresses
82 awarded
Read the entire tour page
4.2k awarded