AMP also short name for Accelerated Mobile Pages Project is an open source initiative to build website pages that render fast. This is due to the fact that user nowadays expect mobile websites to load super fast.
According to a blog on googleblog.com, 40% of people will abandon a website that takes more than 3 seconds to load.
On WordPress, there is a plugin called AMP that instantly convert your web pages to support AMP.
Resources:
https://webmasters.googleblog.com/2016/09/what-is-amp.html
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