Version history is a record of changes made to a document, software, or project over time. It allows users to track modifications, see who made them, and understand when they occurred. This feature is essential for collaboration, as it helps teams manage updates and revert to previous versions if needed. In many applications, such as Google Docs or Git, version history provides a timeline of edits, making it easy to compare different versions. Users can often restore earlier versions, ensuring that important information is not lost and that mistakes can be corrected efficiently.