There are currently 3 supported versions of Windows 10:
1703 (Creators Update), 1709 (Fall Creators Update), and 1803 (April 2018).
This last week has seen updates to all 3 (Windows 10 update history):
1703 – May 17, 2018—KB4103722 (OS Build 15063.1112)
1709 – May 21, 2018—KB4103714 (OS Build 16299.461)
1803 – May 23, 2018—KB4100403 (OS Build 17134.81)
All of these are “quality” releases, what the rest of the computing world calls “bugfixes”.
1803 supposedly fixed the problem with some SSDs.