Cloud migration involves transferring applications, data, and workloads from on-premises infrastructure or other cloud environments to the cloud. The primary focus is to transition existing IT assets and services to leverage the benefits of scalability, agility, and cost efficiency offered by cloud platforms. Key activities include assessing application dependencies, planning migration approaches (such as lift-and-shift, re-platforming, or re-architecting), executing migration plans, testing migrated workloads, and optimizing performance post-migration.