1. Step 1: Plug in your Chromecast device. Plug Chromecast into your TV, then connect the USB power cable to your Chromecast. ...
2. Step 2: Connect your Chromecast device. 
3. Step 3: Download the Google Home app. 
4. Step 4: Set up Chromecast. 
5. Step 5: Cast content.

Chromecast Setup | Chrome Cast Com Setup