Updates are extremely important for operating system because their primary purpose is to maintain its security at a proper level by eliminating vulnerabilities.
On top of that, they often bring new features and improvements that is so exciting. By default Windows 10 is configured to automatically check for updates, download them and install. However, you may set your active hours to tell your operating system when you don’t want your computer to reboot.
But you may want to check for updates, download them and install immediately. Why? Perhaps, if you know that the next hours you will have only the metered Internet connection and it wouldn’t be convenient for you to download and install updates. For instance, when you plan to travel by car and use your mobile data instead of your home unlimited plan.