Find unfollowers, delete passive users, add people like you, check graphics, increase your followers
You follow them but they don't follow you, delete them instantly.
You follow them but they didn't use Twitter for weeks/months. Unfollow them now.
They follow you, but you don't follow them. You can add them now.
Check trends by using search function, find people like you and add to your list.
Check your history. How many followers, unfollowers you had ? Check graphs.
Select a Twitter user and find his/her unfollowers.