Microsoft is starting to roll out the May 2019 Update for Windows 10. The most interesting change is the addition of a light theme that brightens up the interface. It also splits Cortana and search on the taskbar, although you can still perform Cortana tasks in the search box.
Other additions include having more control over installing updates, with the option to pause them for up to 35 days in week-long increments. And with Windows Hello now toting FIDO2 certification, you can sign into apps, devices and services using biometrics and PIN codes instead of passwords.
It should be noted that if you're upgrading from the April 2018 or October 2018 releases, you'll have to remove any SD cards and USB storage before you upgrade. Otherwise, you should feel free to install the May 2019 build when you can.