Following someone on Twitter means:
For example, if you follow @SnoopDogg, you'll get their updates in your Tweets timeline, as shown below (in Fig. 1). Your follower/following numbers are also listed on your home and profile pages.
See who follows you by clicking on 'Followers' on your home page or profile page, and make changes to who you follow on by clicking on 'Following' from either of these pages. To learn how to follow someone, read our article about How To Follow Others.
Followers are people who receive your Tweets. If someone follows you, they will:
(Fig 1.) Click on 'Following' to see a list of accounts that you follow. Their Tweets will show up in your Tweets timeline. Click on 'Followers' to see accounts that follow you.
(Fig 2.) To see what accounts someone is following, just click on the 'Following' tab on their profile.
(Fig. 3) Follower request as it appears on your home page.
(Fig. 4) Follower request as it appears on your profile page.
Yes! To unfollow a user:
Note: Twitter does not notify you when someone has stopped following you.
When all else fails, you can block someone from following you. Your Tweets won't appear in their timeline, but they will still be able to see your Tweets by visiting your profile page (because your Tweets are public.)
Twitter has follow and update limits for site stability and abuse control. You can read more about this here.
Our Troubleshooting pages for Following issues have answers to common problems.