Google Extensions vs Web Apps vs Add-ons

This is a great blog post by Eric Curts from June 2016.  Even though it's from a year and a half ago, it really is a nice break down of the differences between Google Extensions, Add-ons, and Web Apps.  Click the link below to get to his full blog post. 

http://www.controlaltachieve.com/2016/06/extensions-webapps-addons.html