Admob: Change test ads to real ads

Hello guys, I have this script in my game:

BannerView bannerAd;

	private void Start()
	{
		MobileAds.Initialize(InitializationStatus => { });
		this.RequestBanner();
	}

	void RequestBanner()
	{
		string adUnitId = "ca-app-pub-3940256099942544/6300978111";
		AdSize adSize = new AdSize(320, 50);
		this.bannerAd = new BannerView(adUnitId, adSize, AdPosition.Bottom);
		AdRequest request = new AdRequest.Builder().Build();
		this.bannerAd.LoadAd(request);
	}

And it shows test ads like I wanted when I was testing. Now I’m ready to release my game on google play and I’m wondering what I have to do to actually have real ads in my game when I release it?

Did you set App ID as well?