Google introduce AdSense Ad Manager to help with tools to improve revenue opportunities and productivity to all publishers of Google AdSense Ads.
If you operate a site with remnant ad inventory as well as reserved ad inventory that you sell directly to advertisers, then Ad Manager is for you. It can help you sell, schedule, deliver, and measure directly-sold and network-based inventory. Google Ad Manager offers a wealth of features, including an intuitive user interface, automated yield optimization, and proven Google speed and reliability. Best of all, Google Ad Manager is free
From AdSense FAQ
Many publishers with direct ad sales experience the following problems:
Confusing, slow, and complicated workflows
Inflexible site tagging
Uncertainty about which ad source to deliver to optimize yield
Unreliable inventory forecasting
High ad-serving costs
In response to these challenges, Google designed Ad Manager to offer you:
A clear user interface: Increase your staff’s efficiency and productivity.
Simplified tagging: Tag your site only once.
Yield optimization: Automatically maximize your CPMs.
Reliable inventory forecasting: Always know what inventory is available to sell.
Higher ROI: Save costs, because Ad Manager is free.
Learn about AdSense Ad Manager
Apply for Google AdSense Manager