Terraform is an open-source Infrastructure as Code (IaC) tool by HashiCorp, using a declarative language called HashiCorp Configuration Language (HCL) for defining infrastructure. It supports multiple cloud providers, on-premises platforms, and services through resource providers, promoting modularity with reusable modules for organizing resources.
Integrated with version control systems, Terraform enables collaboration, auditing, and rollback capabilities. It manages infrastructure state through state files, ensuring consistency and simplifying updates. Terraform streamlines infrastructure management, reduces human error, and automates provisioning, increasing operational efficiency for DevOps and infrastructure engineering teams.