GitHub Copilot

What is GitHub Copilot?

GitHub Copilot is GitHub's AI programming assistant, powered by a large model and embedded right in your editor. As you code, it predicts what you'll type next and completes lines or whole blocks; you can also ask it questions in plain language to explain, fix or test code.

What can it do for you?

Real-time completion
Type a few characters and it fills in the rest of the function; write a comment and it generates code to match.
Conversational Q&A
Select a block and ask "what does this do?" — it explains in plain words and suggests improvements.
Generation and refactoring
Describe a need and it produces a function, or rewrites spaghetti into something clearer.
Tests and docs
It auto-generates unit tests, comments and READMEs, taking the boring work off your plate.

How does it "get" your project?

It reads your context
It looks at the current file, your other open files and related repo content, so its completions actually fit your project.
It's built on a code model
Underneath is a model trained on a huge amount of public code, so it knows syntax, libraries and common patterns.
It keeps evolving
From early completion to today's Chat and Agent modes, it's gone beyond "autocomplete" to running whole tasks for you.

What should you watch out for?

Copilot is a copilot, not an autopilot: its output can be wrong, insecure, or accidentally close to someone else's code. So use it — and review it. Running tests, reading the logic and checking security and licenses is still on you.

Bottom line: GitHub Copilot is an "AI pair programmer" sitting beside you — it produces fast, but your hands stay on the wheel.