Length: 5 minutes
Each project has a dev and a preview environment.
The dev environment (sometimes called staging) will be running on the `dev` branch and is for testing new features and other development, by the team.
The preview environment will be running on the branch meant for use in production (be it `master` or `prod`) and is meant for the client to keep up with the evolution of the project and to add final content for migration to the final site destination.