Google provides a wide-range of powerful programs to help you do pretty much anything you need. However, even with all the features in their tools, there is probably some task you wish you could do but can’t.
To help address this, Google allows third parties to create the following tools to extend the functions and features of Chrome, Docs, Sheet, Forms, and more:
All three of these do basically the same thing. They provide extended features, tools, and programs that Google did not build into their products originally. Even though all three types of tools have that in common, they are still quite different in many other ways.
"What’s the difference between an extension, a web app, and an add-on?” you may ask.
To help answer this, please refer to this chart that compares and contrasts these tools.
This tutorial explains how to install the Google Chrome extension Screencastify and how to begin recording your screen.