Difference between Running and Starting a Docker container

This is a very important question and the answer is very simple, but fundamental:

1. Run: create a new container of an image, and execute the container. You can create N clones of the same image. The command is:
   docker run IMAGE_ID and not docker run CONTAINER_ID

2. Start: Launch a container previously stopped. For example, if you had stopped a database with the command docker stop CONTAINER_ID, you can relaunch the same container with the command docker start CONTAINER_ID, and the data and settings will be the same.