Moving applications, data, or infrastructure from one environment to another, such as from on-premises servers to the cloud or between cloud providers. Like relocating a business to a new building while keeping everything running.
A company migrates its email system from on-premises Exchange servers to Microsoft 365 cloud, or moves databases from AWS to Google Cloud for better performance.
All providers offer toolsets to discover/assess workloads, move servers (rehost), and migrate databases with minimal downtime. Names differ, but the core capabilities—assessment, replication/transfer, cutover, and validation—are comparable.