DoubleClick for Publishers (DFP) Small Business is a free hosted ad serving solution that helps small business owners manage their growing online advertising business. It features simple interface, workflow and inventory management systems that make it easy to get up and running quickly. The DFP is connected to a large pool of advertisers through Google AdSense and other ad networks.
This powerful ad server solution allows small business websites that sell advertising manage their ads intelligently. Google also just launched the DFP Small Business Academy, a self-guided tutorial and list of readings where small business owners can learn how to use it.