As an app publisher, you must declare **Taboola** as an authorized seller in your **app-ads.txt** file:
Log into **Taboola Backstage UI** and select the **Ads.txt Records** tab (on the left).
Copy the displayed records to your **app-ads.txt** file.
app-ads.txt and ads.txt
_App_ publishers should update **app-ads.txt**. _Web_ publishers should update **ads.txt**.
Both files should be located on the root of your developer website, as reflected in your **Google Play**/**App Store** listing. For more information, see below.
If you have more than one site, make sure to update the **app-ads.txt** records for _each_ of your sites.
Failure to add ALL the relevant entries to your **app-ads.txt** file can result in a **significant reduction in revenue**.
If you have any questions, please contact your Taboola Account Manager.
## What is app-ads.txt?
**app-ads.txt** (Authorized Sellers for _Apps_) is an extension to **ads.txt** (Authorized Digital Sellers for _Web_).
It is an IAB-approved standard that aims to prevent unauthorized inventory sales and increase transparency in the way that digital advertising is sold.
You can read more at the [IAB website](🔗).
## How does app-ads.txt work?
App publishers provide an **app-ads.txt** file on the root of their developer website. This text file lists all companies that are authorized to sell their inventory. (You can find your developer website URL on your app listing in **Google Play** / **App Store**.)
Buyers check the **app-ads.txt** file to confirm which inventory they are authorized to buy, and to verify that the exchange and publisher have a legitimate connection to each other.