A software update, sometimes called a software patch, is not the same as a software upgrade. An update is generally an improvement to the current version of the software or application, while an upgrade is a completely new version of it. Updates are usually free and easy to install. Upgrades often require payment and are more complicated to install.
Unix vs Linux: What's the Difference Between a Software Update and a Software Upgrade?
A software update or patch is a free download for an application, operating system, or software package that provides fixes for features that are not working properly or adds minor software improvements and compatibility enhancements.
Software updates are released to fix security issues as they arise, fix minor bugs in the software, improve the operation of hardware or peripherals, and add support for new device models. These small, incremental updates improve the operation of your software.
A common operating system update is a security update, which is released to protect your computer from vulnerabilities that can be exploited by hackers and viruses. It is a good idea to install security updates when they are released to ensure that your system is as protected as possible against constantly changing threats.
