List of Publishers with Discovery
You can use the Discovery tool to get a list of publishers that match your campaign’s geo and targeting criteria. Simply apply the relevant filters in the Discovery interface and click on the “Download Publishers” button. You can choose from several report options, including the Top 25, Top 50, Top 100, Top 500, or All Publishers (with a maximum of 250,000 rows).
The downloaded .CSV file will include key details such as publisher name, keyword, bundle ID, domain, ad exchange, country code, operating system, creative format and size, device type, IAB category, and the number of bid offers, helping you plan and refine your campaigns more effectively.

Step-by-Step
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Open the Discovery tool from the Left Menu
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Apply filters that reflect your campaign targeting (geo, OS, format, etc.)
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Click Download Publishers
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Choose the report size (Top 25 to All Publishers)
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Your .CSV file will download with all matching publisher data