Terraform Cloud Plus offers continuous validation to ensure infrastructure is working as expected, providing long-term visibility and checks for health and security. Users can create assertions in their Terraform configuration using check blocks, which are a new HCL language feature that allows users to define custom condition expressions and error messages. Continuous validation helps identify issues when they first appear, allowing users to take immediate actions to remedy the situation. The feature provides visibility into infrastructure's health and security, including service configuration, identity and access management, or business logic, ensuring infrastructure is working as expected. Users can create assertions for various use cases, such as AWS Budgets, Google Cloud Functions, Azure App Service Certificates, and more. By using Terraform Cloud Plus, users can gain visibility into their infrastructure's health and security, enabling them to take proactive measures to prevent issues from occurring.