Okay, with another influx of new people, here is again my article "Welcome to Mastodon: Here is what's different and why it's better" medium.com/@Gargron/welcome-to (I am working on a better in-UI onboarding process)

Mastodon

Follow friends and discover new ones. Publish anything you want: links, pictures, text, video. This server is run by the main developers of the Mastodon project. Everyone is welcome as long as you follow our code of conduct!