In to the Google Play listing you need to insert your "Game's website url" that you can find in the SETTINGS tab.
You need to use only presented url.
This is very important for your game's monetisation.
For each game this URL will be different and by default it will redirect all visitors to the main QuickAppNinja website. But you can easily change the way where visitors will be redirected.
For example, if you want to promote your YouTube channel, you just need to insert it in the REDIRECT field.
In this example, all users who will visit game's website url
will be automatically redirected to your YouTube channel