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

It does not know. It automatically checks. Most likely, it does so both every time it’s booted up, and periodically even if it’s been kept on continuously.