A file added to a publisher’s site by its administrators acting like a whitelist of partners (approved supply-side platforms and ad exchanges) that are allowed to sell the publisher’s inventory.
![adstxt-explanation](https://clearcode.cc/wp-content/uploads/2017/11/adstxt-800x458.png?ver=1510190292)
A file added to a publisher’s site by its administrators acting like a whitelist of partners (approved supply-side platforms and ad exchanges) that are allowed to sell the publisher’s inventory.
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