The document discusses the issues of supply quality, fraud, and brand safety in digital advertising. It notes that ad fraud will cost an estimated $16.4 billion in 2017 and that nearly 20% of digital ad spending in 2016 was "wasted". The document outlines the types of fraud like invalid traffic and domain spoofing. It emphasizes the importance of managing inventory quality through strategies like working with supply partners that enforce transparency and have fraud policies. The document also stresses managing brand safety by defining what is safe for brands, using contextual tools, and having protocols to address brand association questions.