What Does ad exchange Mean?
With close to 70 billion impressions flowing in every day as a result of open up advertisement exchanges, publishers have access to a bigger pool of buyers and broader publicity.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，从而比较能保证投放环境的安全性，这个