The DoubleClick Ad Exchange is a real-time marketplace to buy and sell display advertising space. By establishing an open marketplace where prices are set in a real-time auction, the Ad Exchange enables display ads and ad space
to be allocated much more efficiently and easily across the web. It’s just like a stock exchange, which enables stocks to be traded in an open way.

Participants in the Ad Exchange?

• The large online publishers (sellers)—websites like portals, entertainment sites and news sites
• Ad networks and agency holding companies that operate networks (buyers)—companies that connect web sites with advertisers.

But it’s not just the direct participants who benefit. As an individual investor, you can buy and sell shares on the stock exchange through an online broker, without needing to plug in to the NYSE mainframe. It’s the same for AdWords advertisers and AdSense publishers who get access to the extra publishers and certified ad networks in the Ad Exchange, through their AdWords or AdSense interface. Similarly, advertisers who use other participating ad networks can get the benefits of the Ad Exchange.

What does the Ad Exchange mean for the display advertising ecosystem?

Sellers in the Ad Exchange:

• Can make the most money for their ad space, every time a page on their site loads with an ad (called an “impression”). In the past, too many sellers had inventory unsold or sold for a price below its potential market value.
• Get access to many more advertisers, while still being able to control who can advertise on their site.
• Benefit from simplified reporting and payments—a single exchange manages it all.

Buyers in the Ad Exchange:

• Get access to many more websites and more ad space.
• Can use technology that allows them to bid for ad space in real time, depending on how much they value a particular ad impression.
• Have more controls over where their ads run and don’t run.

Google AdWordsTM advertisers:

• Have easy access to the websites in the Ad Exchange, as well as all the existing websites in the Google Content Network—all through their AdWords interface.

Google AdSenseTM publishers:

• Have their ad space available to certified ad networks in the Ad Exchange. This means more quality display advertisers competing for their ad space and higher returns. AdSense publishers get the benefit of this through their AdSense interface, without having to log in to the Ad Exchange itself.