Chromecast should work with Samsung smart TVs (consult your user manual to find out), or any TVs with an HDMI port
If Chromecast is not pre-installed in your smart TV, you might need to plug your Chromecast in a power source and your TV's HDMI slot.
Download the Google Home app
Create a Google account to use the app, if you do not have one
Follow the prompt for the installation
If you have an older TV version, there would be a solution if it has an HDMI input
The input connecters are located at the back of your TV with the label HDMI
You would need to plug the Chromecast's HDMI connecter into the HDMI port on your Samsung TV
Continue the process as indicated above
Let us know if you have any other questions.
Hope this helps. Thanks!