Leads.txt <REAL • BLUEPRINT>

Leads.txt is a text file that allows publishers to declare their authorized digital advertising representatives, commonly known as "leads" or "intermediaries." This file is typically hosted on a publisher's website and lists the entities that are allowed to sell or represent their ad inventory. The Leads.txt file was introduced by the IAB (Interactive Advertising Bureau) Tech Lab in 2018 as a voluntary standard to promote transparency and accountability in digital advertising.