Accelerated Mobile Pages is an open-source coding standard for publishers. The aim for AMP is for publishers to be able to load their sites quickly on mobile since mobile responsive could be clunky and slow because desktop resources are heavy and plenty. If we’re going to be honest with ourselves, most of the elements of a desktop website is unnecessary for a mobile site.
Until recently, AMP was just for User Experience. Now, Google has backed it up – and is encouraging websites to follow suit. Much like how they heralded Schema.org and laid-low Dublin Core for Metadata.