eli5: how does a PS4 know when to update?

Question

when a company releases a new version of software, like a game or a ps4 or a phone, how does it know that it has to update? how does the company tell the PS4 that it has to update now, and how does it tell every PS4 this?

In: Technology

Answer 1

They can “push” updates by setting flags or sending operating system commands that the game console OS looks for on boot up or connecting to the game servers or PSN.