Welcome to release 18.6 of Microsoft SQL Server Management Studio (SSMS)! You can find full documentation about this release and previous releases here: SSMS documentation.
This update is available through Windows Server Update Services (WSUS). Release 18.6 is applicable to previous versions of SSMS 18.x only. This package will fully upgrade any previous 18.x version.
For the release notes for this product, see: SSMS Release Notes.