Terraform is an open-source Infrastructure as Code (IaC) tool developed by HashiCorp. It is widely used in Continuous Deployment pipelines to provision and manage infrastructure across multiple cloud platforms. Unlike traditional scripts, Terraform uses a declarative configuration language, allowing teams to define the desired state of infrastructure and manage it consistently across environments. This makes it ideal for version-controlled, automated deployments. Using Terraform, you can provision servers, databases, networking resources, and more, ensuring that each environment is predictable and repeatable. This supports the principles of CD, where environments must be ready for automated deployment without manual interference.