Vagrant
In plain terms
A tool for managing reproducible development environments.
Going deeper
Vagrant provisions and configures virtual machines from a simple config so teams share identical dev environments. It standardizes 'works on my machine' setups.
Under the hood
Vagrantfile defines the VM; provisioners (shell, Ansible) configure it. Containers have reduced its use.
Examples
Dev environments, reproducible VMs, Vagrantfile, team onboarding.
Think of it like...
Like a recipe that builds an identical workshop on every developer's computer.