How do you know if someone is following you on twitter?

Related questions

1. What is the most used hashtag on Twitter in 24 hours?
2. Should I use hashtags on twitter?
3. Can twitter searches be tracked?
4. How do you follow something on twitter?
5. Can you start a tweet with a hashtag?
6. Can twitter account be traced?
7. Can twitter users see who visits?
8. Can you set up alerts on twitter?
9. Can you track a hashtag on twitter?
10. Does twitter notify when you follow someone?

Tags

1. #badge
2. #follows
3. #someone
4. #doesn
5. #shows
6. #following
7. #profile
8. #twitter
9. #follow
10. #little
11. #their
12. #visting