What an operating system is and why it matters?

An operating system is the main software that runs everything on your computer. Windows, macOS, or Linux. It manages your hardware and runs your other apps. Keeping it updated is one of the most important security things you can do.

An OS sits between your hardware and your apps. Without it, you have an expensive box with no way to use it. Windows and macOS are the main ones for computers. Android and iOS are for phones. Updates add security fixes, so never skip them.