Mobile game monetization is a delicate balancing act. Showing too few ads leaves money on the table, while bombarding players with intrusive pop-ups destroys user retention and brings 1-star reviews. In this guide, we break down how top mobile game studios structure their Google AdMob placements to achieve maximum effective Cost Per Mille (eCPM) while maintaining happy players.

1. The Power of Rewarded Video Ads

Rewarded video ads consistently command the highest eCPMs (often $15 to $35+ in Tier 1 countries like the US, UK, and Canada) because users voluntarily choose to watch them in exchange for in-game currency, second chances, or premium boosters.

• The "Revive" Prompt: Offer a one-time revive when a player dies close to achieving a high score. Players gladly watch a 15–30 second video to keep their momentum.
• Double Rewards: After completing a challenging level, give players the option to "Double Your Coins" by watching an ad.
• Daily Free Mystery Box: Provide a daily spin or chest unlock tied to a rewarded video placement.

2. Strategic Interstitial Ad Frequency Capping

Interstitial ads are full-screen ads shown at natural transition points. Never trigger an interstitial in the middle of active gameplay or immediately after opening the app:

• Frequency Capping: Cap interstitials to show no more than once every 2 to 3 minutes, regardless of how quickly levels restart.
• Smart Grace Periods: Allow new players to complete the first 2 or 3 tutorial levels completely ad-free. Once they are hooked on the core game loop, gradually introduce interstitial transitions.
• Win vs. Loss Transitions: Players are much more tolerant of an ad after a victory screen than immediately after a frustrating loss.

3. Adaptive Banners: Clean and Compliant

Use Google AdMob's Adaptive Banners instead of static legacy banners. Adaptive banners dynamically calculate the optimal ad size based on the device width and screen ratio, yielding higher fill rates and fewer accidental clicks.

4. Enable AdMob Mediation with Real-Time Bidding

Do not rely solely on Google AdMob as a single ad network. Enable AdMob Mediation and connect bidding networks such as Unity Ads, AppLovin, and Meta Audience Network. When ad networks compete in real time for your impressions, your average eCPM automatically rises.