Purpose of adding Second IP address for the same Network Adapter

I found a scenario here : https://www.youtube.com/watch?v=eumOs9LhBIo
on the same Network Adapter, the administrator added a second IP address on the same subnet as the main IP, and he added the subnet mask..that's all, no default gateway no DNS ip address.
He called it management ip address, I am not sure why..
and he disabled:
"Register this connection's addresses in DNS"
"Disable Netbios over TCP/IP"

Fouad - we are talking about a single NIC here.

Thank you Guys!

I do this all the time when configuring and setting up consumer devices. For example if I want to change an IP Camera, SIP phone, or Router from 192.168/24 to 10.10/16 I bind both to my NIC and don't have to keep changing my IP.