What is Twitter?
Twitter is a service for friends, family, and coworkers to communicate and stay connected through the exchange of quick, frequent messages. People post Tweets, which may contain photos, videos, links and up to 140 characters of text. These messages are posted to your profile, sent to your followers, and are searchable on Twitter search. Learn more about how to use Twitter.

Do I need anything special to use it?
All you need to use Twitter is an internet connection or a mobile phone. Join us here! Once you're in, begin finding and following accounts whose Tweets interest you. We'll recommend great accounts once you're signed up.

What's a Tweet?
A Tweet is any message posted to Twitter which may contain photos, videos, links and up to 140 characters of text. Once you've signed up, just type your first Tweet in the update box. We'll even count the characters for you! Click the Tweet button to post the update to your profile. If you'd like to learn more about how to tweet, please read this article.

Why 140 characters?
We like to keep it short and sweet! It also just so happens that 140 characters is the perfect length for sending status updates via text message. The standard text message length in most places is 160 characters per message. We reserve 20 characters for people's names, and the other 140 are all yours!

How do I find people to follow?
When you create an account, you can search for people by name or @username, import friends from other networks, or invite friends via email. You can also follow some of the people we've suggested.

What does it mean to follow someone on Twitter?
Following someone means you've chosen to subscribe to their Twitter updates. When you follow someone, every time they post a new message, it will appear on your Twitter home page. Read more here.

How do I know who I'm following?
After you click the 'Follow' button on someone's profile, you're following them. See a list of people you're following by clicking on the following link on your profile page or on your home page's sidebar.

How do I know who is following me?
Twitter sends you an email when someone new follows you. Set up your email preferences to notify you when you have a new follower. The 'Followers' link on your profile page or home page's sidebar will also tell you who is following you.

What are follow limits?
Twitter has follow and update limits for stability and abuse control. You can read more about this here.