Targeting is rapidly overtaking inventory quality among ad networks as the one aspect that their value hinges on and the one that truly differentiates them. So much so that targeting has become the new “killer app” of ad networks. According to the E-consultancy 2007 Online Ad Network Buyers Guide, targeting was only 1 percentage point behind inventory quality as the single most important differentiator. That was 2007. Since then inventory quality has normalized with every network offering all the same top quality branded sites. Think comScore 200 and you’ll have the right picture. But the ground war around targeting has raged on. Now the single most important factor left that has not been commoditized and can still differentiate the countless ad networks is their targeting. Inventory quality is still an important factor when evaluating ad networks but it has become more like a commodity. Just a check box to be filled. Great inventory? Got it. Everyone has great sites now, or has potential access to great sites which is becoming the same thing, and can whip up a spectacular site list with all the right logos in all the right places. You’ll see that comScore now calls this “potential reach” and everyone’s got potential reach. But targeting? Good, precise, accurate, performance-driving targeting takes technology which is actually hard to come by among the ad networks. Most ad networks are made up of people and relationships and that’s how they scale. Add more great sites and add more great sales people and the revenue model scales accordingly. So what’s the best targeting solution out there? What kinds of targeting will provide the most performance boost for your campaigns? That of course hinges on what your key performance indicators are going to be. Is it clicks, acquisitions, brand awareness or a combination or something else entirely? In many ways contextual targeting has a leg up on the other forms and here’s why. The behavioral crowd almost always has a contextual component driving their segmentation so contextual tends to be one of the most mature technologies out there. Semantic relevance engines have been around since the early days of Knowledge Management and go back way before the first AT&T banner was sold by Doug Weaver on Wired.com in ‘94. And contextual side steps the ugly privacy issues as it derives its relevance from the page content as the ad is being served and does not need to ask probing questions or save little bits of sensitive data behind the scenes. But most importantly, contextual targeting has frequently shown to offer both more click lift and more brand recall than any other targeting solution. A recent Marketing Sherpa study found that contextual targeting was preferred over behavioral by advertisers for the higher return on ad spend it provided. But the best approaches are the new hybrid solutions that combine the strength of both contextual for relevance and behavioral for audience segmentation. So when you are out there shopping for an ad network and everyone is pitching great sites and real transparency at the best price, stop and ask about targeting. Don’t be afraid to ask about technology either. Most likely you will find little behind that curtain besides some basic self declared channels, a little re-targeting after the fact, and a high level report for reconciliation at the end of the month. Take the time to ask for proof and see where that leads you. Can they offer proof as to why they targeted a certain impression with a specific ad? If not then there is probably little technology back there.  And if every answer seems to come back around to great sites, then I’d keep shopping.