Automatically keeping your files updated and identical across all your devices through the cloud. Like having magic filing cabinets that instantly copy changes to all your other cabinets.
When you edit a document on your phone, cloud sync automatically updates that same document on your laptop and tablet.
Cloud Sync is a general capability (keeping files consistent across devices) rather than a single cloud provider service. It’s typically delivered by end-user apps (e.g., OneDrive, Google Drive, Dropbox) built on top of cloud storage plus client sync agents, versioning, and conflict resolution.