📲 How to Integrate AdMob in Unity (Step-by-Step for Android in 2025)

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💡 Want to earn real money from your Unity mobile game? Learn how to Integrate AdMob in Unity or how to show banner, interstitial, and rewarded ads with Google AdMob in Unity.

AdMob is one of the most popular ad networks for monetising Android and iOS games. If you’ve built a mobile game in Unity, this is your chance to add ads and start earning — even with just 100+ users!

Let’s walk through the complete AdMob integration process in 2025.

🧰 What You’ll Need:

✅ Unity installed (2021.3+ LTS preferred)
✅ A working Android game project
✅ Google AdMob account (https://apps.admob.com)
✅ Android device for testing

✅ Step 1: Create AdMob Account & App

Go to https://apps.admob.com
Click on Apps → Add App
Select Android → “Yes” or “No” (if already published)
Add App name, select category, click Add
You’ll get an App ID (Copy it!)

✅ Step 2: Import Google Mobile Ads SDK in Unity

Download the Google Mobile Ads Unity Plugin from:
👉 https://github.com/googleads/googleads-mobile-unity
Import the .unitypackage into your project:
- Go to Assets > Import Package > Custom Package
- Select the downloaded file → Click Import All
Add the GoogleMobileAds namespace:
```
using GoogleMobileAds.Api;
```

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✅ Step 3: Initialize AdMob in Your Game

In your GameManager or any start scene script, add this in Start():

void Start()
{
    MobileAds.Initialize(initStatus => {
        Debug.Log("AdMob Initialized");
    });
}

You can also enable test ads for safe testing:

RequestConfiguration requestConfiguration = new RequestConfiguration
    .Builder()
    .SetTestDeviceIds(new List<string>() { "YOUR_DEVICE_ID" })
    .build();
MobileAds.SetRequestConfiguration(requestConfiguration);

✅ Step 4: Show a Banner Ad

BannerView bannerView;

void RequestBanner()
{
    string adUnitId = "ca-app-pub-xxxxxxxxxxxxx/xxxxxxxxxxx"; // Replace with real ID
    bannerView = new BannerView(adUnitId, AdSize.Banner, AdPosition.Bottom);
    AdRequest request = new AdRequest.Builder().Build();
    bannerView.LoadAd(request);
}

Call RequestBanner(); after initialization.

✅ Step 5: Show Interstitial Ad (Full Screen)

InterstitialAd interstitial;

void RequestInterstitial()
{
    string adUnitId = "ca-app-pub-xxxxxxxxxxxxx/xxxxxxxxxxx";
    interstitial = new InterstitialAd(adUnitId);

    AdRequest request = new AdRequest.Builder().Build();
    interstitial.LoadAd(request);

    interstitial.OnAdClosed += HandleOnAdClosed;
}

void ShowInterstitial()
{
    if (interstitial.IsLoaded())
    {
        interstitial.Show();
    }
}

✅ Step 6: Add Rewarded Video Ads

RewardedAd rewardedAd;

void RequestRewardedAd()
{
    string adUnitId = "ca-app-pub-xxxxxxxxxxxxx/xxxxxxxxxxx";
    rewardedAd = new RewardedAd(adUnitId);

    AdRequest request = new AdRequest.Builder().Build();
    rewardedAd.LoadAd(request);

    rewardedAd.OnUserEarnedReward += HandleUserEarnedReward;
    rewardedAd.OnAdClosed += HandleOnAdClosed;
}

void ShowRewardedAd()
{
    if (rewardedAd.IsLoaded())
    {
        rewardedAd.Show();
    }
}

public void HandleUserEarnedReward(object sender, Reward args)
{
    Debug.Log("Rewarded! Give user coins or extra life.");
}

✅ Step 7: Build Settings for Android

Go to File > Build Settings > Android > Switch Platform
Enable:
- Internet permission in Player Settings > Publishing
- Min API Level = 21 or higher
- Target Architectures: ARMv7 + ARM64
Export as .apk or .aab