You’ll need a few things first: a Chromecast receiver, a Chromecast supported device (like a smartphone, tablet or laptop), and a TV with an HDMI port.
1. Plug the Chromecast receiver into your TV’s HDMI port, attach the power adapter and plug that guy into the wall.
2. On your smartphone/tablet/laptop, download the Chromecast app (from the app store or Google Play store) and follow the prompts for installing it and setting it up. This should include connecting the Chromecast to the Wi-Fi network that your device is connected to.
3. Give your Chromecast a cool and memorable name.
4. Follow the instructions for casting from a mobile app or browser, depending on what you’ve got going on.