An initiative by IAB to reduce ad fraud, mainly inventory arbitrage & domain spoofing. It is basically a text file uploaded on website server to help brands and advertiser purchase authentic inventory.
Ads in the ads.txt is abbreviated of “authorised digital seller”
The file looks as below:
![](https://www.knowonlineadvertising.com/wp-content/uploads/2021/10/image-5-510x114.png)