GitHub Copilot is a powerful AI-based code completion tool that assists developers in writing code faster and with less effort. It offers features such as code autocompletion, integration with various development environments, multi-language support, context-aware suggestions, and a chat interface. To use it with Terraform, ensure the GitHub Copilot extension is installed and enabled in your code editor. While Copilot can suggest infrastructure code, developers must review, understand, and integrate it effectively into their projects.