Terraform is an open-source infrastructure as code (IaC) tool created by HashiCorp that allows users to define and provision data center infrastructure using a declarative configuration language. With Terraform, infrastructure is described using a high-level configuration syntax, enabling a blueprint of your datacenter to be versioned and treated as you would any other code. Infrastructure changes are planned and previewed before deployment, creating a consistent and predictable workflow.

Terraform can manage both low-level components like compute instances, storage, and networking, as well as high-level components like DNS entries and SaaS features, supporting hundreds of providers including major cloud platforms such as AWS, Azure, Google Cloud, and many others. This approach enables teams to manage their infrastructure efficiently across multiple cloud providers through a single, unified workflow.