MDM stands for Mobile Device Management. When a business or educational institution buys a batch of devices from Apple, they often enroll them in a program that allows the organization to add restrictions to all of its devices and essentially have power over them. If MDM is active on your device, you won't be able to activate it without approval from a regulatory authority. Therefore, checking the status of MDM has become as important as the status of Find My iPhone.

Sample:
Case 1: MDM Locked
Model: MACBOOK PRO (13-INCH, M1, 2020) SILVER [MACBOOKPRO17,1]
Serial Number: ***********
MDM: ON
Name: BRUT
Address: LA CITE DU CINEMA, 20 RUE AMPERE, SAINT DENIS, ILE-DE-FRANCE 93200
Phone Number: +33 # ## ## ## ##
Email: support@brut.media
Magic: *******************************
Department: BRUT TECH
Address Line 1: LA CITE DU CINEMA
Address Line 2: 20 RUE AMPERE
City: SAINT DENIS
ZIP: 93200
Country: F.R.A.
Support Email Address: support@brut.media
URL: https://brut.jamfcloud.com/cloudenroll
Is Supervised: TRUE
Allow Pairing: FALSE
Is Mandatory: TRUE
Await Device Configured: TRUE
Is MultiUser: FALSE
Auto Advance Setup: FALSE
Management Protocol Version: TRUE
Skip Buddy Items: Siri; display tone; T.O.S.; payment; iCloud Diagnostics; accessibility; screentime; Apple ID privacy; iCloudStorage; restore

Case 2: No MDM Profile
MDM Status: OFF