Google has officially introduced the Next-Gen Google Mobile Ads (GMA) SDK for Android, and it represents a structural change in how ads are initialized, loaded, and delivered inside Android applications.

This is not just another version update. It is a full architectural improvement. Google is clearly shifting its focus toward this new infrastructure. Future features and innovations will be built on the Next-Gen SDK, not on the legacy GMA versions. For Android publishers using AdMob or Google Ad Manager, this transition is important.

Let’s break down what changes, what improves, and why it matters.

Initialization of Ad Requests in the Next-Gen SDK

One of the most important technical improvements in the Next-Gen GMA SDK is how ad requests are initialized and handled.

In the previous SDK versions, ad loading was more tightly coupled with the main thread and older dependency structure. The new SDK separates concerns more clearly and optimizes how ad requests are constructed and executed.

The new dependency replaces the older play-services-ads package with a lighter and more modular mobile-ads-sdk dependency:

implementation("com.google.android.libraries.ads.mobile.sdk:ads-mobile-sdk:…")

This architectural shift allows:

• Smaller SDK footprint
• Reduced app size increase
• Improved internal threading
• Better request handling performance

Google also improved how callbacks are handled. Ad load callbacks now operate from a background thread, which means developers must explicitly switch to the UI thread when updating UI elements. While this requires a small code adjustment, it significantly improves performance stability and reduces the risk of ANRs (Application Not Responding errors).

Example from migration:

runOnUiThread {
Toast.makeText(activity, "Ad loaded", Toast.LENGTH_SHORT).show()
}

This design reduces blocking operations on the UI thread, making ad rendering smoother and faster.

The result is not only better latency, but also improved app stability and fewer freeze events.

Improved SDK Infrastructure

The core promise of the Next-Gen GMA SDK is infrastructure optimization.

According to Google’s internal data shared in the presentation:

• File size is up to 17% smaller compared to the previous SDK
• Banner ad request latency is up to 27% faster

These two metrics alone can have measurable business impact.

A smaller SDK size means:

• Faster app downloads
• Reduced APK size
• Potentially improved install conversion rates
• Lower storage pressure on devices

Lower ad request latency means:

• Faster banner rendering
• Higher viewability probability
• Less blank ad time
• Reduced user frustration

Additionally, Google announced:

More frequent releases. monthly release cycle instead of 3+ months previously
Quicker bug fixes, emergency releases possible within one week
Increased stability, new tracing frameworks and more stable architecture

This signals a long-term platform strategy. Google is investing in a modern, modular ad infrastructure for Android.

Publisher Success Stories Shared by Google

Google presented four case studies showing measurable improvements after adopting the Next-Gen SDK.

Each case highlights a different performance angle.

nerByte - Game Developer Focused on Stability

nerByte is a mobile game developer based in Austria, known for titles such as Lep’s World. The company was looking to improve Android app performance, especially APK size and stability.

After testing and rolling out the Next-Gen SDK across Lep’s World 3, the integration was completed in under one day.

Results:

33% improvement in app stability (ANR rate reduction)
50% reduction in slow cold starts
Migration time under one day

For game publishers, stability directly affects retention. A 33% improvement in ANR reduction is significant for user experience and long-term monetization.

PXR and NextDay Media - Performance and Viewability

PXR and NextDay Media are digital innovators focused on high-performance platforms and monetization.

Their goal was to reduce ad-related performance complaints, especially slow load times and disruptive behavior.

After integrating the Next-Gen SDK:

+6% viewability
+16% fill rate

Google noted that improvements in viewability are likely driven by reduced latency and fewer ANRs, rather than direct changes to measurement logic.

Higher viewability combined with increased fill rate translates directly into improved effective CPM and monetization efficiency.

MetaMobile and AnyMind – ARPDAU Uplift

MetaMobile, supported by AnyMind, adopted the Next-Gen SDK early.

They observed:

+91.5% ARPDAU uplift
+36% eCPM increase

This is one of the strongest monetization examples shown.

Reduced device footprint, improved latency, and consistent update cadence contributed to revenue growth.

When ARPDAU increases almost 2x, it means the SDK change had meaningful impact on monetization mechanics.

Airfind – ARPU Growth and Latency Reduction

Airfind operates a premium adtech marketplace and provides the S’more Android lockscreen app.

After implementing the Next-Gen SDK:

50% increase in ARPU
20% increase in show rate
33% decrease in ad request latency

Lower latency increased show rate. Higher show rate increased monetized impressions. Combined, this drove ARPU growth.

This case confirms that infrastructure improvements can cascade into revenue improvements.

How to Implement and Migrate to the Next-Gen SDK

The migration process is structured in three steps.

Include the Next-Gen SDK dependency

Replace the previous dependency with the new mobile-ads-sdk dependency in Gradle.

Handle callbacks from background thread

Ad callbacks now execute off the main thread. If UI changes are required, switch explicitly to the UI thread using runOnUiThread or equivalent method.

Migrate ad requests

Old:

val adRequest = AdRequest.Builder().build()
InterstitialAd.load(this, "AD_UNIT_ID", adRequest, callback)

New:

val adRequest = AdRequest.Builder("AD_UNIT_ID").build()
InterstitialAd.load(adRequest, callback)

Ad unit ID handling is slightly adjusted depending on format.

Google also provides migration guides for both AdMob and Google Ad Manager setups.

Flutter support is not yet available at the time of the presentation.

Troubleshooting Implementation

Google recommends using Ad Inspector.

Ad Inspector helps:

• Launch inspection programmatically or with gestures
• Verify third-party adapter integration
• Troubleshoot ad request and response issues
• Validate mediation setup

This tool is important especially when verifying mediation partners and checking whether adapters are correctly initialized.

Best Practices for Implementation

Impression Level Ad Revenue (iLAR)

If using impression-level ad revenue callbacks, migrate to the new API (onAdPaid).

Test before release is must.

Use Google Play staged rollout. Release to a small percentage of users, monitor stability and revenue metrics, then ramp up gradually.

Controlled rollout steps:

Integrate on test build
Release to small traffic percentage
Monitor metrics for several days
Increase rollout percentage
Reach 100% users

This reduces risk and ensures clean migration.

Questions that you might have

Why is it important to implement the Next-Gen SDK?

Because Google is no longer building new features for previous GMA SDK versions. Innovation and future improvements are focused entirely on the Next-Gen architecture.

Staying on the legacy SDK means limited future updates and potentially missing performance optimizations.

What about iOS?

There are no structural changes announced for iOS. Some of these architectural improvements are already implemented in the iOS SDK.

What if I have Hybrid (Native + WebView)? Any apps best practice?

For hybrid apps, initialize the SDK with the actual App ID instead of the placeholder:

WEBVIEW_APIS_FOR_ADS_APPLICATION_ID

This ensures proper SDK behavior in hybrid environments.

Are there significant updates to viewability rate?

Publishers reported increased viewability. However, Google clarified that this is likely due to reduced latency and fewer ANRs, rather than direct changes in viewability measurement methodology.

Bottom Line

The new GMA SDK appears to be well tested, and publishers are not reporting issues with the release. It looks safe and even promising for both your ad revenue and your app performance. Consider making this a priority in your next sprint. :)

If you have any additional question feel free to reach out!