- How to use ES6 `classes`

- It's an upgrade to `Promises`

- Makes writing an asynchronous function more readable

- It's a programming style; it defines how to organise your application

- In OOP each program would be split up into self-contained objects, that then communicate with each other

- Each object represents a part of the application: it contains its own data and logic

- OOP is meant to make thinking about your applications easier, by having each object represent a real-life entity (i.e. Users, Profiles, Products)

- `classes` are a modern way of creating objects in JavaScript

- It's `syntactical sugar` for object constructors

- A `class` is a blueprint of an object, that can be instantiated