There is a php web application, they said they need protection for DRM files, I have never heard about DRM, where can I read it?

Question

PHP

There is a php web application, they said they need protection for DRM files, I have never heard about DRM, where can I read it?

Answer 1

https://www.google.com.ua/search?q=DRM

Answer 2

What is DRM is googled in 3 seconds.
Accordingly, further DRM protection is different, depending on the type of file (PDF, video, audio, etc.).
Naturally, removing any such protection is like two fingers in a socket. And the sooner you convey this idea to the leader, the better)