MajidCS

No, I do not feel any anxiety about it

This means we can not be trusted in any site on the internet, because all the sites can be redirected.

Private Tweet has private server.

Private Tweets followed Twitter's best practices for security to ensure that their API. That means that if you can trust Twitter to send something, you can trust us.

Because not all people in Twitter you know, and you can not get their mail.

When there is a famous person, and you want to send him a private message, what do you do?

Are you should follow everyone they follow you until they send you or you send him a private message?

You can write a long letter in Twitter.

You can not attach a file in Twitter

If the message does not want to be seen by anyone and you can not put it in public.

Private tweets will help you to do that.