This course explores Docker, a platform that enables users to develop, ship, and run applications inside lightweight, portable containers. It covers the essentials of containerization, how it differs from virtualization, and the benefits of isolated environments in development and production workflows. Participants learn to define and manage container images using Dockerfiles, orchestrate containers using Docker Compose, and operate containers with the Docker CLI. The course also touches on best practices for building efficient images, handling data persistence with volumes, and managing networking between containers. By the end of the course, learners understand how to leverage Docker for developing and deploying applications consistently across different environments, enhancing their DevOps toolkit.