AMP stands for Accelerated Mobile Pages, which are Web pages, optimized for a simplified and with almost instantaneous loading, when accessed via mobile devices.
Basically, an AMP page has an architecture that prioritizes the loading speed of the page.
PWA stands for Progressive Web App, the entire site, after a visit, can be viewed offline as if it were an application.
When you search Google using your phone, the AMP pages are marked with their acronym AMP. By clicking on a result marked AMP, the page is loaded almost instantly.
