Among loads of news coming out of Microsoft's developer conference Build 2016, the firm has also released Windows 10 Insider Preview to the Slow ring for both PCs and phones.
The build was originally released to the Fast ring five days ago and it is the first Redstone build to be released to the Slow ring. This is an important note to make, as some users were using the ring to grab cumulative updates. If you want to continue to only receive cumulative updates, you need to switch to the Release Preview ring.
While the build itself doesn't provide any new features from its predecessor - build 14291 - it will provide quite a few new features for those getting their first Redstone build through the Slow ring. These include extensions for Microsoft Edge, a new Maps app, and more.
Source: Windows Blog