Can someone explain twitter to me in short/long, little lost?

[lalalala]

well basically you can write tweets that are up to a 140 characters long. you can follow people, and this shows up in your "timeline," which shows all the tweets from the people your following as the come in. if you want to reply or tweet someone, you type @(whatever their username is). you can also make hashtags (#typewhateveryouwant.) and hashtags are helpful if you have a specific movement going on with people you know, or if there is a trend going on and you want to put in your two scents, you #(whatever the trend is) and say your witty comments on it. i know this is all confusing but you'll get used to it =]