Hi @Zac Miles ,
Yes, CU is a rollup update which means that the newest CU includes new fixes and all previous fixes (CUs as well as Public Updates) that were released after a major version e.g. RTM or SP1.
Microsoft uses the name Public Update for this rollup update but the name Cumulative Update makes more sense.
Cumulative Updates are released every month.
Usually you install CU when:
- At least every 2 years so you are eligible for Microsoft’s product support
- If the CU fixes a specific problem you have.
- If the CU enables support of newly released software e.g. a new major version of SQL Server.
To install the latest SharePoint Cumulative Updates in your farm, you could refer to this blog for more information:
How to install SharePoint Cumulative Updates in a SharePoint Farm Step by Step
Reference:
https://andreasglaser.com/blog/sharepoint-2016-updates#cumulative-updates
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