A friend who just joined Mastodon asked what they can do there that they couldn't on Twitter. Here's what I answered:
You can talk to people in other places that aren't (just) about furries. You can talk to services that aren't like Twitter. You can use any client you want forever, without fear that the platform will start banning them.
You can trust that moderators genuinely care about this place and listen to people. You can support them directly, knowing they'll understand if you lack the means. You can be free of ads, induced rage and other manipulation.
Social media isn't just about features. Corporations want you to think it is, so you'll keep buying the latest shiny nothings they're selling this week. Don't fall into that trap. Why are you here in the first place?
We need very little to be happy. We do, however, need the right things for it. And as of late everyone's trying to sell us the stuff they want to sell, with no concern for... just about anything else.
Push back.