The term 'data migration' entails the process of transferring data between storage systems, databases, or formats. It often occurs during organizational upgrades, such as transitioning to a new system or consolidating data sources. Data migration involves several critical steps, including planning, extraction, transformation, and loading (ETL) of data to ensure compatibility and integrity. Proper execution is essential to minimize downtime and data loss, highlighting the importance of careful planning and testing to ensure a smooth transition.