AdMob激励视频因包名无法展示求助：No fill错误排查

Hey there, let's break down this tricky ad issue you're facing—this is actually a super common scenario when launching a new app with ad networks, so you're not alone!

First, let's unpack why swapping to a well-known game's package name works: those established apps have a history of user traffic, ad request patterns, and proven engagement that ad networks trust. Advertisers are eager to place ads there because they know they'll reach active users. Your new package name, though? It's a blank slate—ad networks don't have data to match relevant ad inventory to your requests, hence the No fill error.

Now let's go through actionable fixes to get your incentive videos loading properly with your own package name:

1. Double-check your ad platform configuration #

• Verify that your incentive video ad unit ID matches exactly between your code and your ad network dashboard (e.g., AdMob). It's easy to copy-paste a wrong ID without noticing.
• Make sure your app's package name is correctly linked to your ad network project. If you imported your app from Google Play into the dashboard, confirm the package name matches 100%—even a tiny typo can break things.
• Ensure the incentive video ad unit is enabled in the dashboard. Sometimes new units are disabled by default, or there's a delay post-setup.

2. Fix the "new app cold start" problem #

• Ad networks prioritize apps with proven user activity. Start by driving some real, organic traffic to your app (even a small group of beta testers works). Every ad request sends data to the network, helping it learn about your user base (location, session length, etc.) and match relevant ads over time.
• Enable ad mediation if you haven't already. Instead of relying on a single ad source, mediation lets you connect multiple networks (like Unity Ads, IronSource, or AppLovin). This drastically increases your chances of getting ad fills, especially for new apps where a single network might have no inventory to offer.

3. Rule out policy or rating issues #

• Check your ad network's policy center for any warnings or restrictions. Incentive videos sometimes have stricter policy checks than banners/interstitials—even a minor policy oversight could limit fills.
• Confirm your app's content rating is correctly set in both Google Play Console and your ad network dashboard. If your rating is set too high (e.g., mature content), many advertisers will avoid your app, leading to low fill rates.

4. Avoid risky workarounds (like spoofing package names) #

• I know it's tempting to use a well-known package name to test, but this violates ad network policies and could get your entire developer account banned. That's a way bigger problem than a temporary No fill error.
• Instead, use your ad network's official test ad units. These are designed to always return fills, so you can confirm your code logic is working correctly without risking policy violations.

Give these steps a try, and be patient—fill rates for new apps almost always improve as you build up user activity and ad request history. You've got this!

内容的提问来源于stack exchange，提问作者Nguyen Hoai Nam