The two biggest players in Contextual Advertising are: Google AdSense, and the Yahoo Publisher Network (YPN).
First let’s list the similarities between Google AdSense and YPN.
1. They both have the largest network of Publishers, and Advertisers. Their ad formats are similar, and both networks offer the ability to advertise on RSS feeds.
2. Both have a great reporting center, with Real-time stats.
3. Neither will disclose how much revenue you will make from any category or advertiser.
4. You’re not allowed to run both Google Adsense, and YPN on the same webpage.
5. And their Terms of Agreement are similar.
Now let’s list the differences between the two giant Contextual Networks:
1. Google is more diverse because they offers image ads, CPM ads, and ad links.
2. Yahoo Publisher Network currently only offers the traditional ad sizes, and ads for RSS feeds.
3. AdSense accepts all International publishers, YPN does not while its in Beta
4. YPN pays higher commissions than Google Adsense to the publishers.
Question: Which Contextual Network is best for you?
Basically, they seem the same, right? Ideally, if you can, conduct a test. If you can’t, then just pick one, and run with it. However, what you see on other websites might not work equally well for your website.
Here’s how to test:
There are some pretty good third party tools for testing like: PHPAdsNew which permits rotating ads on a 50/50 basis, or whatever rotation you decide. PHPAdsNew also can be geotargeted for the Yahoo Publisher Network (YPN).
Another useful tool is the AdSense Preview Tool.
Then, use your web analytics to track things, like which ads are being clicked on, CTR, IP addresses, dayparting, etc.
Do the rotating A/B Split Testing for a week or two, or until you have enough data that you’re comfortable making a decision. Once you have enough data, you’ll need to analyze things like, CTR, earnings per CPM (eCPM), etc.
After all this, you’ll be confident to make the right decision in choosing your Contextual Network.
FYI: Some other smaller contextual ad networks are, Kanoodle BrightAds, IndustryBrains, MSN ContextAds, Fastclick, and BlogAds.