Enterprise Mobility Management (EMM) or Mobile Device Management (MDM) encompasses the Security, User Management, Data Management and Application Management of devices such as smartphones and tablets.
Functionality between products can be varied - there's a whole raft of solutions out there, and they all cater for slightly different scenarios. They main players as we see it are Microsoft (With Intune, AzureAD and Azure RMS extending the capabilities of SCCM), VMWare (Airwatch) and MobileIron there are also a number of niche applications such as the casper suite from Jamf Software. The marketplace is quite crowded - with the proliferation of applications and mobile devices vendors have realised that there are issues managing devices and applications outside of the control of the business but performing valuable business functions, and so have delivered the variety of solutions we see today.
BertramCanis can help you in understanding your key problems and selecting the right technology for your needs.