Terraform is an open-source infrastructure as code software tool created by HashiCorp. It allows users to define and provision infrastructure using a high-level configuration language. It was first released in 2014 and has since grown in popularity as a tool for managing cloud infrastructure. In the beginning, Terraform only supported a few providers such as AWS, Google Cloud, and Microsoft Azure, but now it supports many more providers, including Kubernetes, OpenStack, and more. The tool enables you to provision and manage your infrastructure using code rather than manually clicking around in a web console. This means that you can version control your infrastructure, automate provisioning, and easily reproduce environments.