This video will give you a quick introduction to EasyLayouts
This video gives a brief overview of how to use EasyLayouts in the backend of Joomla
See Geraint's talk from JAB17 about using Custom Fields in Joomla! 3.7 and how using EasyLayouts makes it so much easier.
You can access the slides from here (to navigate use your left and right keyboard buttons or swipe on your touch device).