AdMob is launching support for app-ads.txt

Your Publisher ID: pub-3213408464096368

Get ready for app-ads.txt enforcement

At Google, we're always committed to protecting the safety of your app revenue. A key challenge faced by apps is inventory fraud from bad actors. To help publishers combat this challenge, we're getting ready to support and enforce app-ads.txt across our ads systems to ensure advertiser spend reaches the intended publisher.

What is app-ads.txt?

App-ads.txt is an extension of the original ads.txt standard which provides a mechanism for web publishers to declare their authorized digital sellers. It is intended to protect app publishers from inventory spoofing from fraudsters.

What is changing and what does it mean to you?

We are excited to announce that AdMob will be supporting and enforcing app-ads.txt for publishers who have published an app-ads.txt file to their developer domain starting on 2019-08-08.

To prepare for this change, please make sure the published app-ads.txt file on your developer's domain does not contain any errors or typos.

How can you ensure your app-ads.txt file is implemented correctly?

If your file contains any errors or typos, your ad serving will be at risk of getting blocked because any files published will be regarded as the source of truth for enforcement.

So it is extremely important to have correct implementation and resolve any errors before 2019-08-08, or the file will need to be unpublished from your domain to avoid unintentional revenue loss.

As such, we invite you to carefully review your app-ads.txt file if you already have published one prior to the launch date. The file should be published at the root directory of the website listed on your Android Play Store or iOS App Store listing. More details can be found in the IAB hosting spec.

Setting up your app-ads.txt file

It is important to make sure your app-ads.txt file is correctly set up, as errors may result in unintentional revenue loss. There will be no impact to you if you choose not to implement the app-ads.txt file on your developer website, but your app will be at risk of inventory spoofing from bad actors.

For publishers working with Google products, your app-ads.txt files should contain lines in the following format. It should always use google.com as the domain name and you should replace the publisher ID with your ID.

Here is a sample line:

google.com, pub-0000000000000000, DIRECT

Learn more

AdMob User Interface Updates

We are currently rolling out verifications and warnings for app-ads.txt files that are set up incorrectly to the AdMob user interface. If you don't see it when logged in to your account , please check again soon. The warnings will appear if you have a typo or missing an ID in your file that may negatively impact your ad serving.