Terraform is a tool that leverages infrastructure as code to safely and efficiently provision infrastructure, providing speed and efficiency benefits over legacy provisioning solutions. It has features such as Sentinel policy as code, Terraform module registry, and HashiCorp Vault integration to improve security posture. Sentinel allows users to define policies that are enforced against infrastructure during the plan and apply phases of a Terraform run, preventing provisioning of out-of-policy infrastructure. The Terraform module registry ensures all infrastructure is meeting best practices by providing standardized modules for infrastructure components. Additionally, the Vault integration secures sensitive credentials used to build infrastructure by encrypting them with dynamic credential generation, making it difficult for unauthorized parties to access them. By leveraging these features, organizations can improve their infrastructure security posture and achieve a range of goals such as limiting oversized cloud deploys and ensuring proper tagging.