Answer:
They help keep your software up to date.
Explanation:
Using Windows for example: With automatic updates, you don't have to search for updates online or worry about missing critical fixes or device drivers for your PC.
You can read more about it here: https://support.microsoft.com/en-us/windows/windows-update-faq-8a903416-6f45-0718-f5c7-375e92dddeb2
I hope this helps you!