Ads not working on the production build of android game

Question

I made an android game. I added some ads on it with the test mode off and than I released the game to internal testers and the ads were working so than I fixed some issues in game and released the game for production on playstore.

Now that the game is up on Playstore ads are not working. Will it take some time for ads to show up? There was a popup on unity monetization dashboard that I need to update package name and I did it but ads are still not showing up although playstore listing shows that my app contain ads.

My code is :

public string gameId = "ihavemygameidhere";

public bool testMode = true;
void Start()
{
    // Initialize the Ads service:
    Advertisement.Initialize(gameId, testMode);
}

public void ShowInterstitialAd()
{
    // Check if UnityAds ready before calling Show method:
    if (Advertisement.IsReady())
    {
        Advertisement.Show();
    }
    else
    {
        Debug.Log("Interstitial ad not ready at the moment! Please try again later!");
    }
}

Answer 1

When the ad is not ready, that means that the ad server has not yet sent an ad to be seen. I would recommend placing the IsReady() check in a Coroutine, then showing a loading screen UI when the player is waiting. I would also put a fail of some amount of time in case the IsReady() always fails.

[SerializeField] private GameObect LoadingUI = null;
private float waitTime = 5f;

public void ShowInterstitialAd()
{
    StartCoroutine(ShowAd());
}

private IEnumerator ShowAd()
{
    float currentTime = 0.0f;
    
    LoadingUI.SetActive(true);
    
    while(currentTime <= waitTime && !Advertisement.IsReady())
    {
         currenTime += Time.deltaTime;
         yield return null;
    }
    
    // show the ad if it is now ready
    if(Advertisement.IsReady())
    {
         Advertisement.Show();   
    }
    else
    {
        Debug.LogError("Error: Ad was not able to be loaded in " + waitTime + " seconds!");
    }   
    
    LoadingUI.SetActive(false);
}

Make sure to assign some object in the inspector for the LoadingUI object so players can not tap to view ads again or just some UI that blocks all input while the ad is attempting to load. I would use a ScreenOverlay UI as it would be rendered over everything.