On join-lemmy.org, the project is described as "A forum and link aggregator for the Fediverse". In the previous post, multiple people mentioned that this is not a good description. However I have a hard time coming up with anything better.
So please post your suggestions below, and upvote the ones which are both accurate and easy to understand for new users. Later I pick one of the most upvoted options for the website.
By the way the second title "Follow communities Anywhere in the world" will likely go away (see the pull request for frontpage redesign). After this is decided I may also make another post to get suggestions for the longer description text below ("Lemmy is a selfhosted social link aggregation and discussion platform. ...").
Edit: Please only post concrete suggestions in top-level comments, and use replies to discuss. And here you can see how a few other Fediverse projects do it: