What Does User State Migration Tools (USMT) Mean?

User State Migration Tools (USMT) is a scriptable command-line tool for advanced users which is able to provide customizable user-profile migration, to transfer settings and files between PCs. Because USMT is lightweight and highly customizable, it is able to support a high volume and automate transfer and deployment of settings and files between networked PCs. Usually this is from an older version of Windows into a newer one.

Techopedia Explains User State Migration Tools (USMT)

User State Migration Tools (USMT) is an application intended for use by Microsoft Operating Systems Administrators who perform large-scale automated deployments and transfers of user states from previous operating systems and hardware into new and separate Windows Operating Systems and hardware. USMT is not required when upgrading the OS in the same hardware since all data and user states are retained, unless it is a clean install. For small-scale user-level and individually customized migrations and deployments, Windows Easy Transfer can be used instead.