It allows ad buyers to verify exactly which exchanges (e.g., Google, Rubicon, AppLovin) have a legitimate relationship with the publisher. How to Access and Use the File
If you are a developer or advertiser looking to verify FIFA’s authorized partners, you can access the file directly at the root of their domain:
Major ad networks increasingly favor verified inventory. Without this file, a site may be labeled "untrustworthy" and lose out on high-value programmatic ad campaigns.