If you are new to Twitter, here is an article for you.
People of all walks of life are on Twitter. Each with his/her own schedule. Some use Twitter for business purposes, some to communicate with their friends and loved ones, and a few to learn from business insiders on subjects that they find interesting.
More Information Here Twitter Unfollow Tool
Once you've got a couple tweets under your belt and follow a couple hundred individuals and are followed by a few hundred, the power of Twitter starts to set in.
One of the first things you will notice is that your Twitter timeline featuring the tweets of that you are after will move faster and quicker as you add more people to your listing. The issue with this is that it makes the tweets of your followers harder and harder to see as their tweets come from every which way in your timeline. When you have thousands of followers, your timeline will probably be moving at the speed of light!
To combat this issue, you are left with just one option and that's to unfollow some of your Twitter followers. It's sad but true.
Though this is the major reason to unfollow somebody, I also thought it might be beneficial to compile a record of some of the other reasons why you might want to unfollow somebody besides attempting to clean up your Twitter timeline to ensure it is readable.
As you become more familiar with Twitter, you'll know why I've included these reasons.
In no specific order...
Tweeting past tweets over and above. As folks don't have a tendency to be tracking their Twitter accounts 24 hours a day, 7 days a week, some users prefer to tweet exactly the exact same articles at least once a day or several times each week. Although good in concept, people who see the same content repeated over and over will more likely than elect to eliminate the excessive posting Twitter user from their list of followers.
The major takeaway from this article will be considerate of other people so that you may minimize the speed of individuals "unfollowing" you.