There are many products and services available to help a content network.  The trouble is that access to some of them costs money.  So, as a straight-from-the-Googler’s-mouth alternative, ways to improve content network performance were recently discussed on a Google blog for free.

Content Networks are the primary source of revenue for most Ad-Based sites. Measuring to optimize revenue from these sources is an interesting set of problems – but even more interesting are cases where a site blends revenue from multiple sources. Most common among these are sites that sell banner ads directly as well as Content-Network placements.