The Share to NotionNext plugin allows seamless integration between Obsidian and Notion databases, including support for NotionNext and custom Notion databases. Users can sync notes directly from Obsidian to Notion with custom properties, tags, and metadata. The plugin supports various database types such as General, NotionNext, and Custom databases, enabling flexibility in managing and organizing content. Advanced features include long note synchronization, property editing, and previewing database details within Obsidian settings. With this plugin, users can streamline their workflow between Obsidian and Notion efficiently.