You found your group of people, you followed them all and most of them followed back. What now? You can't just leave them there. They are like real followers, and you are the guide for them. You want them to be interested in your product or service. If you bore them, or they don't find interest in you, they will just un-follow you. You want to get those followers, and keep them.

Always communicate with your followers. Keeping in touch, and having a social, but professional bond with them will increase the friendship between them and your product. Maybe when someone new and significant follows you, say hello! Or maybe randomly ask how someone's day has been. Always respond to your mentions. If you had an interesting article on your product, and someone retweets it, say thanks! After all, a retweet can cause another retweet!

Know when to differentiate. I'm sure everyone likes to acknowledge their own product and always talk about it on their account, referring to their website. But, when people see tweet after tweet that all are related to the same thing, they may feel that you are a bit "spammy." That is where you try to differentiate; start a conversation or debate. Throw something out there, maybe ask how your product is doing to someone who had bought it. Always come back to your product and professionalism, but let loose and get to meet all the types of people on Twitter.

Keeping your followers is essential to having a great Twitter account and having a great bond with the people who are interested in your product. When you keep your followers, you know you are doing well.