https://www.bleepingcomputer.com/news/microsoft/windows-10-21h1-is-released-here-are-its-new-features/

Microsoft has released the next version of Windows 10 called "21H1", or the May 2021 Update, and it is available to all users as an optional update in Windows Update.

The Windows 10 21H1 feature update is a very small release and does not bring too many new features. However, it does come with performance and security enhancements that will improve the operating system's overall experience, making it worth installing.