What is Docker in your own words?

Docker is a platform for building, delivering, and running applications in isolated containers. Containers allow you to package an application together with all its dependencies and configurations so that it works the same way in any environment — on a local machine, server, or in the cloud.

The main advantage of Docker is lightweight isolation, which is faster and simpler than virtual machines. This facilitates development, testing, and deployment, reducing environment compatibility issues.

Example: instead of manually setting up the environment, you can create a Docker image with the required Python version and libraries, and run a container with this image everywhere consistently.