Sync, or synchronization, refers to the process of coordinating data or actions between different devices or systems. This ensures that all parties have the same information at the same time, which is essential for tasks like file sharing, communication, and collaborative work. For example, when you update a document on your computer, sync allows that change to be reflected on your smartphone and tablet. In technology, sync often involves cloud services, such as Google Drive or Dropbox, which store data online and keep it updated across multiple devices. This way, users can access their files from anywhere, ensuring that they always have the latest version available.