refixed by #, like "#gameing" or "#pineapple". You can click on a hashtag to search for other posts containing that tag.

## How is it like email?

Each Mastodon instance is independent but networked, like email servers. If you sign up for an email account on gmail.com, you don't automatically have an account on hotmail.com or aol.com, but you can send and receive messages to and from users on hotmail.com and aol.com. 

Likewise, if you sign up for an account on mastodon.social, that doesn't make an account