Cloud migration is the process of moving digital assets — applications, data, workloads, and IT resources — from on-premises infrastructure to cloud-based environments, or between cloud providers. It's a fundamental transformation enabling scalability, agility, and cost optimization across AWS, Azure, GCP, and other platforms. Migration isn't a one-time lift; it requires strategic planning through assessment, execution, and continuous optimization phases. Understanding the 6 R's framework (Rehost, Replatform, Refactor, Repurchase, Retire, Retain) is essential, as each application demands a tailored strategy based on business goals, technical complexity, and ROI timelines.