How can i make a Google Mobile Adsense in my Unity game ??

when i use the Google Mobile Ads plugins,the banner appear but if i click on he's doesn't work. Can you help me .

I use this code:

using System; using UnityEngine; using GoogleMobileAds; using GoogleMobileAds.Api;

// Example script showing how to invoke the Google Mobile Ads Unity plugin. public class GoogleMobileAdsDemoScript : MonoBehaviour { public GUISkin GuiSkinBanner; private BannerView bannerView; private InterstitialAd interstitial; void Update() { RequestBanner ();

 }
 
 void OnGUI()
 {
     GUI.skin = GuiSkinBanner;
     Rect showBannerRect = new Rect(Screen.width/2-160,Screen.height-50,
                                    320,50);
     if (GUI.Button(showBannerRect, ""))
     {
         bannerView.Show();

     }
 }
 private void RequestBanner()
 {
     #if UNITY_EDITOR
     string adUnitId = "unused";
     #elif UNITY_ANDROID
     string adUnitId = "ca-app-pub-8800874330043208/1754401517";
     #elif UNITY_IPHONE
     string adUnitId = "INSERT_IOS_BANNER_AD_UNIT_ID_HERE";
     #else
     string adUnitId = "unexpected_platform";
     #endif
     
     // Create a 320x50 banner at the top of the screen.
     bannerView = new BannerView(adUnitId, AdSize.SmartBanner, AdPosition.Bottom);
     // Register for ad events.
     bannerView.AdLoaded += HandleAdLoaded;
     bannerView.AdFailedToLoad += HandleAdFailedToLoad;
     bannerView.AdOpened += HandleAdOpened;
     bannerView.AdClosing += HandleAdClosing;
     bannerView.AdClosed += HandleAdClosed;
     bannerView.AdLeftApplication += HandleAdLeftApplication;
     // Load a banner ad.
     bannerView.LoadAd(createAdRequest());
 }
 
 private void RequestInterstitial()
 {
     #if UNITY_EDITOR
     string adUnitId = "unused";
     #elif UNITY_ANDROID
     string adUnitId = "ca-app-pub-8800874330043208/1754401517";
     #elif UNITY_IPHONE
     string adUnitId = "INSERT_IOS_INTERSTITIAL_AD_UNIT_ID_HERE";
     #else
     string adUnitId = "unexpected_platform";
     #endif
     
     // Create an interstitial.
     interstitial = new InterstitialAd(adUnitId);
     // Register for ad events.
     interstitial.AdLoaded += HandleInterstitialLoaded;
     interstitial.AdFailedToLoad += HandleInterstitialFailedToLoad;
     interstitial.AdOpened += HandleInterstitialOpened;
     interstitial.AdClosing += HandleInterstitialClosing;
     interstitial.AdClosed += HandleInterstitialClosed;
     interstitial.AdLeftApplication += HandleInterstitialLeftApplication;
     // Load an interstitial ad.
     interstitial.LoadAd(createAdRequest());
 }
 
 // Returns an ad request with custom ad targeting.
 private AdRequest createAdRequest()
 {
     return new AdRequest.Builder()
         .AddTestDevice(AdRequest.TestDeviceSimulator)
             .AddTestDevice("0123456789ABCDEF0123456789ABCDEF")
             .AddKeyword("game")
             .SetGender(Gender.Male)
             .SetBirthday(new DateTime(1985, 1, 1))
             .TagForChildDirectedTreatment(false)
             .AddExtra("color_bg", "9B30FF")
             .Build();
     
 }
 
 private void ShowInterstitial()
 {
     if (interstitial.IsLoaded())
     {
         interstitial.Show();
     }
     else
     {
         print("Interstitial is not ready yet.");
     }
 }
 
 #region Banner callback handlers
 
 public void HandleAdLoaded(object sender, EventArgs args)
 {
     print("HandleAdLoaded event received.");
 }
 
 public void HandleAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
 {
     print("HandleFailedToReceiveAd event received with message: " + args.Message);
 }
 
 public void HandleAdOpened(object sender, EventArgs args)
 {
     print("HandleAdOpened event received");
 }
 
 void HandleAdClosing(object sender, EventArgs args)
 {
     print("HandleAdClosing event received");
 }
 
 public void HandleAdClosed(object sender, EventArgs args)
 {
     print("HandleAdClosed event received");
 }
 
 public void HandleAdLeftApplication(object sender, EventArgs args)
 {
     print("HandleAdLeftApplication event received");
 }
 
 #endregion
 
 #region Interstitial callback handlers
 
 public void HandleInterstitialLoaded(object sender, EventArgs args)
 {
     print("HandleInterstitialLoaded event received.");
 }
 
 public void HandleInterstitialFailedToLoad(object sender, AdFailedToLoadEventArgs args)
 {
     print("HandleInterstitialFailedToLoad event received with message: " + args.Message);
 }
 
 public void HandleInterstitialOpened(object sender, EventArgs args)
 {
     print("HandleInterstitialOpened event received");
 }
 
 void HandleInterstitialClosing(object sender, EventArgs args)
 {
     print("HandleInterstitialClosing event received");
 }
 
 public void HandleInterstitialClosed(object sender, EventArgs args)
 {
     print("HandleInterstitialClosed event received");
 }
 
 public void HandleInterstitialLeftApplication(object sender, EventArgs args)
 {
     print("HandleInterstitialLeftApplication event received");
 }
 
 #endregion

}