Why use Docker as a developer?

This tool can really change a developer’s daily life. In order to best answer this question, I have written a non-exhaustive list of the benefits you will find:

Docker is fast. Unlike a virtual machine, your application can start in a few seconds and stop just as quickly.
Docker is multi-platform. You can launch your container on any system.
Containers can be built and destroyed faster than a virtual machine.
No more difficulties setting up your working environment. Once your Docker is configured, you will never have to reinstall your dependencies manually again. If you change computers or if an employee joins your company, you only have to give them your configuration.
You keep your work-space clean, as each of your environments will be isolated and you can delete them at any time without impacting the rest.
It will be easier to deploy your project on your server in order to put it online.