EMM, or Enterprise Mobility Management, is the software layer organizations use to enroll, configure, secure, and monitor mobile devices such as phones and tablets. It typically covers device registration, policy enforcement, app deployment, update control, and compliance reporting. In practice, EMM is the control plane for a managed mobile fleet.
EMM matters because mobile devices often carry email, VPN access, single sign-on tokens, and business apps, making them high-value targets. If a device is unmanaged, stolen, outdated, or rooted, attackers may find a weaker path into corporate data than through a laptop or server. Security teams use EMM to require passcodes, encrypt storage, block risky settings, stage operating system updates, and remotely wipe lost devices. In attacks, adversaries may try to bypass EMM enrollment or abuse weak policy settings; in defense, strong EMM helps keep the device under policy from day one.