SharePoint Server 2019 has significantly improved the application of patches, along with the size of patches. This provides a faster, more reliable experience for SharePoint Administrators.
The Basics of Patching
Each patch will be delivered in an executable format. There will typically be one or two executables per month, called Public Updates. The primary executable is called “sts” while the secondary is “wssloc”. The “sts” patch is the primary patch file, while the “wssloc” patch file ...