If you don't know, you probably don't need it. Still, it's a rest api. That's about as simple as it gets. Google rest api to find out what that is and what it does. When you click the "like" button for a post anywhere and it shows up on facebook as a "like" that was a rest api (the now use the graph api, but it essentially is good enough to describe what the rest api does). The rest api allows external applications to access data and otherwise have a means of interfacing with your wordpress site.
dunar21 answered this one perfectly, closing as resolved.
Also, I was unclear on how to use it initially - but Ryan has written some great docs on it. Easiest thing to do may be to install a markdown viewer browser plugin - then go here:
@shaver Thank you for the link I'll sure take a look.
I understand developers don't like to spend their time explaining things but since there is some type of documentation, I can't see why they do not share it in the description of the plugin?
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