Note: note the use of both Windows Update Status and Branch Progression hashtags.
The following is applicable if you happen to be using older Windows 10 feature updates (1803 and earlier to be exact):
Windows 10 Version 1903 (May 2019 Update) is ready for broad deployment. Windows Release Health Dashboard was updated on September 26th to say:
Windows 10, version 1903 (the May 2019 Update) is designated ready for broad deployment for all users via Windows Update.
As devices running the Home, Pro, and Pro for Workstation editions of Windows 10, version 1803 (the April 2018 Update) will reach end of service on November 12, 2019, we are broadly updating these devices, as well as those running earlier versions of Windows 10 that are past end of service, to keep these devices both supported and receiving monthly updates. If you are not offered the Windows 10, version 1903 feature update, please check below for known issues and safeguard holds that may affect your device.
We recommend commercial customers running earlier versions of Windows 10 begin broad deployments of Windows 10, version 1903 in their organizations.
This means people on 1803 and earlier (and some folks on 1809) will see “Feature update to Windows 10, Version 1903” or “download and install now” link on Settings/Update and Security/Windows Update. After taking precautions (backup, driver and screen reader updates, etc.) and if you are ready for it, install the offered feature update.