Microsoft began rolling out the November 2019 Update, which will upgrade Windows 10 to version 1909. Windows 10 1909 has been spoken about since July on Microsofts blog they state the following

“Today, we are announcing that the Windows 10 November 2019 Update is now available for users on the most recent versions of Windows 10 who seek the new update via Windows Update.” Going on to say “We continue to provide you with more control over updates, making it largely up to you to initiate when an update occurs and increasing transparency throughout the update experience. To keep Windows 10 devices supported and receiving monthly updates, Windows Update will automatically initiate a feature update for devices that are at, or within several months of reaching, end of service. We continue to work to improve Windows 10 quality and will be closely monitoring and sharing the current status of the update via the Windows release health dashboard and following @WindowsUpdate on Twitter.”

As with the most recent Feature update, you will need to explicitly choose to download and install the November 2019 Update at this time. If you do not see ‘Feature update to Windows 10, version 1909 on your device, you might have a compatibility issue and a safeguard hold is in place by Microsoft.

I would like to point out that updating to the latest version of Windows 10 is important as version 1803 is no longer supported.