TL;DR: Maptiks WAB widget here!
What is WAB?
WAB is Esri’s Web AppBuilder, a graphical tool enabling users to make map-centric apps with little or no coding. Through a browser-based builder, app authors can configure their app, from styling, to content (from ArcGIS Online), to additional pieces of functionality in the form of widgets.
What is a story map?
Essentially, a story map is a collection of maps, text, and other media content, all packaged within a single web application. Esri has provided several story map templates that you can use to get started. Just choose a template, configure it to use your ArcGIS Online maps, add your narrative text, and update any available styles to your liking. Each template has its own look and feel, and is intended to provide the final user with a specific experience.