Docker is an open source solution for the management of isolated containers. Docker allows you to put website or software code in containers so it can be used in other systems without the necessity to create resource intensive virtual machines. The software can be managed either via a hybrid Cloud or with the help of existing physical hardware resources. Docker Containers are virtualized abstract objects that interconnect code into dependencies. They are used for the building and deployment of lightweight applications that can be installed in a package on one machine or server. The containers ultimately boost performance and save memory, consuming far less resources than traditional virtual machines.

Docker is an important tool when you’re building the groundwork for any modern application. Primarily, it allows for easy deployment to the cloud. On top of that, Docker technology is also more controllable, more granular and is a microservices-based method focused towards efficiency.
Benefits of Docker Containers:
- Fast deployment of new services with limited memory and performance resources.
- Consistent and isolated environments.
- Accelerated software development and deployment and cost effectiveness.
- High accessibility and mobility to run anywhere.
- Decreased chances of conflicts.
- Decreased downtimes and flexibility for upgrades.
- Environments remain more consistent in Docker, from start to finish. You can easily test, roll back and deploy changes.
The Docker goal is to ease the creation, deploy, and delivery of an application using the so-called Containers. The Docker Containers allow the developer/sysadmin to bundle an application with all needed components (libraries and other resources) and to deliver it as an independent and single package. Docker is an open source. This means that anyone can contribute to Docker and extend it to meet their own needs if they need additional features that aren’t available out of the box.