Google Docs version history allows users to review and restore previous versions of their documents, making it easier to track changes and collaborate with others. By default, version history is automatically enabled in Google Docs, and users can access it by clicking the version history icon or selecting File > Version history > See version history. The feature provides a high-level view of every version of the document, along with information about who made edits and when those changes were made. Users can also review specific versions, restore previous versions, and copy text from one version to another. Additionally, Google Docs allows users to assign names to different versions of their documents for easier collaboration and tracking. The feature also includes a built-in comparison tool that enables users to compare two versions or any two documents, making it easier to spot differences and collaborate more effectively.