According to the AMP website:

AMP is an open-source HTML framework that provides a straightforward way to create web pages that are fast, smooth-loading and prioritize the user-experience above all else.

AMP pages are cached by the Google AMP Cache which are used by Google Products (including search) to speed up URL requests. It’s basically a proprietary CDN tied to a search engine.

Although I am not a fan of Google and don’t use their services, I discovered AMP is built into Nextjs, so I gave it a go.

The basic instructions are on the Nextjs AMP documentation page.

Here is a Sample Amp Page on this site.