Initialize the SDK in Unity

Initialize the Unity Ads SDK with your Game ID to enable monetization and access Unity Ads public APIs in your Unity project.

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Important

You must configure user consent before or during SDK initialization. Serving ads without consent configuration may violate privacy regulations in some regions.

To initialize the SDK, you must reference your project's Game ID for the appropriate platform. You can locate the Game ID from the Unity Ads Monetization dashboard by selecting the Monetization suite, navigating to your current project, then Settings in the secondary navigation bar, and scrolling to the Game IDs section.

Note

Starting April 1, 2026, apps that monetize with Unity Ads through direct integration through the Advertisement Legacy Package might see reduced ad performance. To avoid reduction in performance, switch to integrating Unity Ads as a bidder.The Unity Ads network will continue to support and provide fill for all apps using direct integration. However, to maximize revenue and performance, the recommended best practice is to install the Ads Mediation package for LevelPlay, Unity's ad mediation platform.

In your game script header, include the

UnityEngine.Advertisements

namespace. Initialize the SDK early in the game's run-time life cycle, preferably at launch, using the

Initialize

function. In SDK versions 3.7.0 and later, you can use

IUnityAdsInitializationListener

callbacks to receive a notification when initialization is complete, or receive the details when an error occurs.

SDK initialization example


using UnityEngine;using UnityEngine.Advertisements;public class AdsInitializer : MonoBehaviour, IUnityAdsInitializationListener{  [SerializeField] string _androidGameId;  [SerializeField] string _iOSGameId;  [SerializeField] bool _testMode = true;  private string _gameId;  void Awake()  {    InitializeAds();  }  public void InitializeAds()  {    #if UNITY_IOS    _gameId = _iOSGameId;    #elif UNITY_ANDROID    _gameId = _androidGameId;    #elif UNITY_EDITOR    _gameId = _androidGameId; //Only for testing the functionality in the Editor    #endif    if (!Advertisement.isInitialized && Advertisement.isSupported)    {      Advertisement.Initialize(_gameId, _testMode, this);    }  }  public void OnInitializationComplete()  {    Debug.Log("Unity Ads initialization complete.");  }  public void OnInitializationFailed(UnityAdsInitializationError error, string message)  {    Debug.Log($"Unity Ads Initialization Failed: {error.ToString()} - {message}");  }}

Next steps: To continue your integration, refer to the Implement interstitial ads in Unity documentation.

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