Socialhome is best described as a federated personal profile with social networking functionality. Users can create rich content using Markdown and even HTML/JS/CSS (if set as trusted user). All content can be pinned to the user profile and all content will federate to contacts in the federated social web. Currently federation happens using theActivityPub and Diaspora protocols.
Please check the official site for more information about features. Naturally, the official site is a Socialhome profile itself.