You can connect your MacBook to a TV and make the latter a big-screen computer display. The easiest way to do this is through AirPlay, and using this wireless connection, you can mirror or extend your MacBook display onto the TV.
If your TV doesn't support AirPlay, there is an alternative - simply use a video cable to hook up the MacBook to an HDMI port (most likely, or another connector) on the TV. In this case, there's no mirroring or extending - you can use the TV as your Mac display only.
