These are "Windows Installer Patch" files used for MSI-based versions of Office 2016 (like Office Professional Plus). IT professionals often use these to create updated installation images for large-scale deployments.
Individual security or stability updates (e.g., KB5002498) can be downloaded as executable files directly from the Microsoft Download Center . patch file microsoft office 2016
The safest way to patch your software is through official channels. Avoid searching for "patch files" on third-party sites, as these are often malicious "cracks". These are "Windows Installer Patch" files used for
Depending on how you installed Office 2016, you will encounter different types of patch files: patch file microsoft office 2016