Docker revolutionizes app development by enabling developers to build, ship, and run applications efficiently in containers.
Containers are lightweight, standalone software units that share the host OS kernel, making them faster than traditional virtual machines.
To get started with Docker: Install Docker Desktop for Windows/macOS or use the package manager for Linux, verify installation with 'docker --version', and run your first container like an Nginx web server.
Key Docker commands include listing running containers, building images from Dockerfiles, stopping and removing containers. Further steps involve learning Dockerfiles, exploring Docker Compose, and leveraging Docker Hub for pre-built images.