To connect to your TV, open the Home app on your mobile device and select the Chromecast device you want to use. At the bottom of the screen you'll see a button labeled Cast my screen -- tap it.
there are still plenty of reasons why one might want to cast from a laptop to a TV. Maybe you want a bigger screen to share your Google Chrome, Safari, or Microsoft Edge activity with others ...
So if you're tired of watching alone on your mobile device and want to go big ... There should be an option labeled Screen cast. If you can't find it, use the Smart View shortcut, which is ...