The Fediverse is a large network of platforms that all speak a common language. Imagine if you could reply to Instagram posts from Twitter, or interact with your favorite Medium blogs from Facebook — federated alternatives like PixelFed, Mastodon, BookWyrm, and WriteFreely enable you to do these types of things.
WriteFreely can communicate with other federated platforms like Mastodon, so people can follow your blogs, bookmark their favorite posts, and boost them to their followers. If you want an account on this instance, don't hesitate to contact StoryDragon if you already know him on Mastodon or in real life. Or maybe you might have a bit of luck sending an email to him at admin@storydragon.nl