What is Docker and its benefits?

Docker is the open-source containerization platform developers use to bundle applications into containers. Containers are standardized executable components that combine application source code with the operating system libraries and dependencies that are needed to run that code in any environment. In layman’s words, Docker is an open-source application development, deployment, and management environment for containers. Containers are lightweight by design and can also be much faster than virtual machines. Users can use Docker containers to run software anywhere they want without worrying about performance or security. What is Docker and its benefits?