If you’re already running SQL Server Management Studio (SSMS) 18, a notice should appear advising that an upgrade to 18.9.2 is available. You can get the latest version from Download SQL Server Management Studio (SSMS) – SQL Server Management Studio (SSMS) | Microsoft Docs

If you need the latest version of SQL Server Management Studio, visit Download SQL Server Management Studio (SSMS) – SQL Server Management Studio (SSMS) | Microsoft Docs.

Most commercial applications we engage with are running SQL Server and SSMS is the primary tool we use to work with them.