Microsoft is adding a new post-update experience to Windows 10 that displays the prominent changes in a just installed update. The feature is currently rolling out in the Windows 10 preview build 20190 in EN locales such as the US, UK, AU, IN, and CA. It is not fully rolled out yet, and we had to manipulate a few things to get it to display in tests by BleepingComputer. If it is not being shown in preview 20190, you need to wait until it has finished rolling out.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-tips-apps-will-soon-show-new-features-in-an-update/