What is Vagrant used for?

Vagrant is used for creating and managing virtualized development environments, making it easy for developers to set up and share consistent, reproducible development setups. Vagrant will allow developers to specify the configurations for their environment in a simple file called Vagrantfile; it will boot virtual machines with the operating system of their choice, with all the required libraries and dependencies installed. In this way, all team members will work in exactly the same environments, hence reducing issues like “it works on my machine”.
The most common use of Vagrant in DevOps is provisioning for development environments, testing infrastructure, and deployment workflow automation. It goes well with VirtualBox, Docker, and VMware for virtualization.