The document provides an overview of AWS Migration Hub, which is a service that helps manage migrations of applications and workloads to AWS. It discusses common challenges with tracking migrations across different tools. AWS Migration Hub aims to simplify and accelerate migration execution by integrating with tools like AWS Application Discovery Service, AWS Server Migration Service, and AWS Database Migration Service. It allows users to discover applications on-premises, track migration status of applications in AWS Migration Hub as they are migrated using various tools, and then decommission servers once an application is fully migrated.