Check whether your Smart TV uses Android TV or Google TV
Open the TV’s Settings menu
Go to Security, Privacy, or Device Preferences
Enable Install unknown apps or Unknown sources if needed
Connect the TV to the internet
Open the Google Play Store app if it is already installed
Sign in with your Google account
Search for the app you want and install it
If Play Store is missing, download the Google Play Store APK on a USB drive from a trusted source
Insert the USB drive into the Smart TV
Use a file manager app on the TV to open the APK file
Install the APK and follow the on-screen prompts
Restart the TV after installation
If the TV does not support Google Play Store, use a streaming device like Chromecast with Google TV, Fire TV, or Android TV box