NOT KNOWN FACTUAL STATEMENTS ABOUT AD EXCHANGE

Do they specialize in a certain vertical? As an example, Criteo usually discounts with advertisers in ecommerce, while other advertisement exchanges focus more on substantial media brand names or other niches.提供了较安全的投放环境：广告网络在采购媒体资源时往往选择比较高质量的网站资源，从而比较能保证投