I was following a tutorial on YouTube and the game ID was shown in the ADS section of the Services tab. I cannot seem to find mine, however, in the screenshot below.

CodePudding user response：

1. Go To http://dashboard.unity3d.com/

2. Click the Monetize button

3. Select Project

4. Click Ad Units

Then you can check this link https://unityads.unity3d.com/help/unity/integration-guide-unity