A service that offers online ad space for sale to advertisers. This space can represent inventory from hundreds and thousands of websites. A general rule is that some inventory is more valuable than others, so it costs advertisers more. Think of buying a TV ad placement during “the big game” versus during a mop infomercial at 3 am. Depending on the ad network, the payment structure may be based on cost per thousand impressions (CPM), cost per click (CPC), or cost per acquisition (CPA).

Building an Opt-In List, Building Relationships
If you aim for success, you must do everything within your means to achieve that. You just donít go on sitting there in your house complaining about not getting as much profit as you expect.