What is Backstage ?

 Backstage is constructed out of three parts

1. Core

2. App

3. Plugins

What is Storybook ?

 Storybook is the most popular tool for UI component development and documentation.

Each story allows you to demonstrate a specific component variation to verify appearance and behaviour.

Previously, you'd have to spin up the app, navigate to a page, and contort the UI into the correct state. This is a massive waste of time and bogs down front-end development. With Storybook, you can skip all those steps and jump straight to working on a UI component in a specific state.

Storybook makes it easy to work on one component in one state (aka a story) at a time.