Another thing that new users may not realize is that your Mastodon account isn't limited to following other Mastodon accounts. Mastodon uses a common open source protocol called ActivityPub, and can interact with other services that use that same protocol. Pleroma, for example, or PeerTube, or PixelFed. It's like being able to subscribe to Instagram or YouTube from your Twitter account.
@lrhodes thanks for explaining:)
@rainbowvomit RSS stands for Really Simple Syndication. It's an old internet standard — much older than Mastodon or Twitter — that's used to alert subscribers to updates on a site. Basically, it's an open source way to subscribe to a blog or a news site, and it's the backbone for most social media services.