As you’ve probably noticed by now, Microsoft is releasing two Windows 10 updates each year. The one that most of you probably have is v. 1809. It was released in September 2018.
The next is v. 1903 (Initially released for testing in March 2019). Before it’s rolled out for the general public, it is tested by a lot of people and when the company is satisfied that it works as advertised, it is released in it’s final version.
This update is called the May 2019 Update and is now being gradually rolled out. If the update is available in your region, it will not be installed automatically, but rather offered as an available “Feature update to Windows 10, version 1903” that you can choose to “Download and install now”. To update, go to Settings>Update & Security>Windows Update and check for new updates.