iCloud is a cloud computing service by Apple, providing online storage and synchronization for users’ digital content. It enables seamless access to photos, videos, documents, and more across Apple devices. iCloud also offers features like Find My, allowing users to locate lost devices, and automatic backup of device data. With iCloud Drive, users can store files in the cloud, and iCloud Photos ensures photos and videos are accessible from any device. It enhances collaboration with shared folders and supports services like Mail, Contacts, and Calendar. iCloud ensures a cohesive and integrated user experience within the Apple ecosystem.