TERRAFORM is an open-source Infrastructure as Code (IaC) tool developed by HashiCorp. It allows users to define and provision infrastructure resources such as servers, databases, and networks using declarative configuration files. By utilizing a consistent and reproducible approach, Terraform enables automated, scalable, and efficient management of infrastructure across multiple cloud providers, on-premises environments, and hybrid setups. Its key features include state management, modularity, and support for multi-cloud infrastructure.