The AMP plugin is a must if you want your website to possibly show up in the Google AMP Search Results. The AMP pages are basically super stripped down versions of your webpage, using a slightly modified AMP-HTML markup that allows for super fast page loads, basically instantaneous. This is awesome for a number of reasons.
Upon activation, the plugin automatically creates AMP versions of your pages and posts. The AMP version is found by adding “/amp/” to any URL.
Out of the box the styling is very basic, but there are numerous tutorials on the web to show you how to make modifications if you so desire. Any beginner developer could probably figure it out.