GitHub Copilot has grown from an AI autocomplete tool into a development partner that can participate across the entire software-building process. It can suggest code as you type, reason about an unfamiliar codebase, turn natural-language instructions into implementation plans, make changes across multiple files, run tests, review pull requests, and even work on tasks asynchronously through its coding agents. Because it lives across the editor, terminal, GitHub, and developer workflows, Copilot keeps AI close to the code rather than treating it as a separate destination.