Creating a document allows you to manage Confluence page trees as single units of content and version these.
When you create a new document, you start out by defining the page tree of a first working version of the document. Later on, you can save more versions to create various snapshots of the page tree across multiple points in time.
You can create and manage as many documents and document versions as you need and add metadata to customize and distinguish between the different documents and versions.
Learn how you can create and manage documents and its versions: