A:Answer Thank you for a great question!
The WiFi connection, or ethernet connection, is to connect this soundbar to your local network, and Cast to it with Google Cast-compatible apps. Once you set it up with our VIZIO SmartCast app through your Android or iOS smartphone or tablet, you can use apps like Spotify and Pandora and send them directly to the soundbar using Google Cast.
Thanks again and have a great day! -Collin