We rarely talk about are the challenges presented by the REST API, especially for non-developers, mostly because the only people who talk about the REST API are developers.

This talk  provides a short guide to the WordPress REST API from a non-developer perspective: what is it, how it will change WordPress development, combined with some thoughts on the impact it will have on projects created with WordPress and the people creating them.

Source: Video: The WordPress REST API Guide for Non-developers – Petya Raykovska

Petya gave an excellent talk at WCUS that I highly recommend everyone watch to better understand the REST API that shipped as a part of WordPress 4.7