How to Make My Personal Tweets Private
Twitter is a social network that allows you to exchange real-time messages known as "Tweets." Each tweet is 140 characters in length. Twitter allows you to follow friends or have them follow you, posting tweet after tweet. If you prefer to keep your personal tweets private, protect your account quickly and easily. Once protected, only you and anyone you select will have access to your messages.What this means is that not only your Tweets but also your profile will not be public, and only Twitter users you have approved will be able to see your tweets or your profile.
Go to Twitter and log into your account.
Click the "Settings" menu on the right to access your "Account Settings."
Scroll down to the "Tweet Privacy" section and click the check box next to the "Protect my tweets" option.