John Lindquist: Where destructuring in ES6 allows you to easily get properties out of an object, this shorthand property syntax allows you to easily push properties in. It's like destructuring backwards.
If I have a first name and a last name and I want to create a person, I can just say, "firstName, lastName." Then when I log out my person and I run this, you can see that it logs out an object with the first name of John and a last name of Lindquist.
If I wanted to build some more objects, like I want to build a team. I have a mascot with a Moose, and I wanted to build a team like this, where I have a person and a mascot, and then I log out my team. I have a team object with a person of "firstName, lastName," John and Lindquist, with the mascot of moose.
This syntax allows you to easily construct objects with the properties and things you already have and just build them up however you'd like.