Cloud migration and modernization are no longer fringe strategies — they’re central to enterprise transformation. Organizations today face mounting pressure to exit legacy environments, adopt scalable cloud platforms, and unlock innovation through modernization. Forrester’s research shows that success depends on planning, governance, people, execution, and strategic decisions like enterprise resource planning (ERP) migration. This report synthesizes Forrester’s most relevant research to help leaders navigate each stage of the journey — from initial planning through day 2 optimization — with clarity, structure, and confidence.