GitHub Copilot is an AI-powered code completion tool developed by GitHub and OpenAI, launched in June 2021, aimed at enhancing developer productivity and code quality through context-aware suggestions in various programming languages. It integrates with popular code editors and provides real-time code suggestions, but users should be mindful of its limitations and ethical considerations regarding open-source licenses. The tool assists both beginners and experienced developers in writing consistent, error-free code by suggesting entire functions, classes, and boilerplate code.