SocialBro allows you to discover your new followers and easily follow them back e.g. to discover if any of your new followers are influential or famous. You can also search within your competitor’s followers to find those worth following and easily follow multiple users at once.
You can use SocialBro to clean up your account by detecting noisy friends, potential spammers, and inactive users. On Twitter it is best to have a good ratio of followers to friends as users may use this to base a decision on whether to follow you or not. If you have a lot more friends than followers it might be worth unfollowing some users who do not have the potential to become a customer or help you spread your message ect.