Terraform is an open-source infrastructure as code (IaC) software tool created by HashiCorp. It allows developers to define and provision data center infrastructure using a high-level configuration language known as HashiCorp Configuration Language (HCL). Terraform supports a wide range of cloud providers, such as AWS, Azure, and Google Cloud, as well as on-premises environments. By using Terraform, infrastructure can be versioned, shared, and reused across different environments, ensuring consistency and reducing manual configuration errors. Terraform enables automated infrastructure management, making it a key tool for implementing DevOps practices and achieving scalable, repeatable infrastructure deployments.