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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
11 awarded
First bounty you manually award on your own question
67 awarded
Ask a well-received question on 5 separate days, and maintain a positive question record
260 awarded
First bounty you offer on another person's question
19 awarded
Question score of 10 or more
540 awarded
Question with 1,000 views
2.9k awarded
First bounty you offer on your own question
161 awarded
Ask a question and accept an answer
3.5k awarded
First question with score of 1 or more
7.6k awarded
Asked a question with zero score, no answers, no comments, and low views for a week
2.7k awarded

Answer Badges

Edit and answer 1 question (both actions within 12 hours, answer score > 0)
141 awarded
Answer score of 10 or more
589 awarded
Answer more than 30 days after a question was asked as first answer scoring 2 or more
533 awarded
Answer your own question with score of 3 or more
73 awarded
Answer a question with score of 1 or more
3.6k awarded

Participation Badges

Complete "About Me" section of user profile
20.2k awarded
Visit an election during any phase of an active election and have enough reputation to cast a vote
439 awarded
Leave 10 comments
656 awarded
Earn at least 200 reputation (the daily maximum) in a single day
10 awarded
Followed the Area 51 proposal for this site before it entered the commitment phase
116 awarded
One post with score of 2 on meta
112 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.
31 awarded

Moderation Badges

First flagged post
556 awarded
First rollback
45 awarded
First down vote
525 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
21 awarded
First edit
5k awarded
Edit first post that was inactive for 6 months
233 awarded
First retag
253 awarded
Delete own post with score of -3 or lower
28 awarded
Approve or reject 100 suggested edits
11 awarded
Use 30 votes in a day
100 awarded
First up vote
9.5k awarded
First approved tag synonym
1 awarded
First tag wiki edit
53 awarded
Use the maximum 40 votes in a day
75 awarded

Other Badges

Visited every section of the FAQ (retired)
Share a link to a question later visited by 25 unique IP addresses
154 awarded
Read the entire tour page
4.6k awarded