An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

web-musicfive.web.app achieves the best ad optimization: its app-ads.txt has no errors and matches what its 4 ad networks expect (100% of 4 lines).

Checked 20 Oct 2026. 24 lines, 24 unique records, 0 duplicates, 0 invalid lines, 6 ad networks detected.

Google AdMob — account pub-6855000455565507: 1 line in the file
Meta Audience Network — account 2518666031729499: 1 line in the file
PubMatic — account 160565: 1 line in the file
TikTok Ad Network (Pangle) — account 9898: 1 line in the file
Mintegral — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing

Yes — https://web-musicfive.web.app/app-ads.txt has 24 lines (checked 20 Oct 2026).

Its app-ads.txt lists Google AdMob, Meta Audience Network, PubMatic, TikTok Ad Network (Pangle), Mintegral, Yango Ads.

web-musicfive.web.app achieves the best ad optimization: its app-ads.txt has no errors and matches what its 4 ad networks expect (100% of 4 lines).