Support ID is a very important thing in the game. It contains letters and numbers and looks something like ABC123. You always need to provide it when you contact support with an issue, so we can check what went wrong in your account. You also need to remember or to save it somewhere in case, if you've reinstalled the game or chosen the wrong saving option. If you have your support ID - a lot of questions and issues can be solved a lot easier and faster ;)
Please, kindly note, that your custom nickname in the game can't be used for any of the issues described above. Support team always need your unique support ID. So, how to know where to find it?
You can find it by tapping on your avatar in the game in the upper left corner of the screen:
You can find it in the game settings by opening the Menu in the upper right corner of the screen and tap on settings button there. You can even copy your support ID from here by tapping the green button and after that you just need to past it into a message to support.
And one of the most important ways to find your support ID when you can't get in the game. You can see your support ID even on the loading screen of the game. It's marked in the upper left corner of the screen: