Mobile device management
Also known as MDM
Managing the configuration and security of phones and tablets that access company data.
Full MDM enrolls the device and manages it wholesale, which suits company-owned hardware. For personal phones, application-level management is usually the better fit: company data is contained and can be wiped without touching anything personal.
Getting this distinction wrong is the fastest way to a staff revolt, because nobody wants their employer able to wipe their own phone.
Where this comes up
Mobile device management sits inside our microsoft 365 and cloud work. If you are trying to work out what this means for your own environment rather than in the abstract, that is the page worth reading next, and a short call will get you a straight answer faster than either.