The Etherpad Lite plugin is a collaboration tool that allows you to share and edit notes with others in real-time. With this plugin, you can upload any note to an Etherpad-Lite server and share the URL with others. The document remains in your vault, but its contents are replaced with the latest version from the server each time it's opened. You can also view the note in your system browser and copy the URL to share with others. Configuration is simple, requiring only the server's host, port, and API key settings. This plugin provides a lightweight collaboration solution that integrates seamlessly into Obsidian, making it easy to work with others on your notes.