Google said that “the Stories carousel, now available in the United States, India and Brazil at the top of Discover, helps you find some of the best visual content from around the web. In the future, we intend to expand Web Stories to more countries and Google products.”
In order to use Stories, just tap on a Story on the shelf, and you’ll “enter an experience that’s full-screen and immersive.” To go to the next page, tap the screen, or swipe to go to a new Story.
Here’s an example:
If you’re curious on how to build out Web Stories, you can check out the documentation provided by Google on the AMP site.
You can also find plugins and tools for WordPress as well.
Source – Google Web Creators