How exactly does Twitter work?

[RandomMacaroons]

nah, it isn't about phones!

It's a place where you just tweet about any random thing like what you're doing, or what you see in 140 words and simply tweet it! Those following you on twitter will be updated with the message that you sent. This is mostly based on the internet.

Your friend's partly correct, you can tweet on your phone too, except that you'd have to use the internet on your phone or use a twitter application available in your country to tweet.

It may or may not cost you money to tweet with your phone, depending on the application you are using. Using and joining twitter is completely free by the way!

Enjoy!