The Google content network has started accepting and displaying advertisements from qualified third-party vendors. This means that Google Adsense publishers will now have more variety of ad inventory and more ad spot competition which will help webmasters earn more money from the Adsense program.

Google suggests that Ad servers, rich media ad agencies and research firms can go through a certification process. They now have the ability to serve ads and measure performance through these certified third parties:

Advertiser ad servers: DoubleClick (DFA), Mediaplex
Rich media agencies: DoubleClick Rich Media, Eyeblaster, EyeWonder, Interpolls, PointRoll, Unicast
Research firms: Dynamic Logic, IAG Research, InsightExpress, Factor TG

They also provide some insight to allow third-party ads on your site:

1. Third-party ads are only available in image or Flash – this means if you are opting for text only unit, switch them to image+text ads so that you can get full advantage of the ad competition.

Remember image ads are available in the following formats only and you can switch to these ad unit sizes to take full advantage of these third party ads

leaderboard (728×90)
banner (468×60)
skyscraper (120×600)
square (250×250)
small square (200×200)
medium rectangle (300×250)
large rectangle (336×280)
wide skyscraper (160×600)

2. Third-party ads usually target specific websites – make a custom channel into an targetable ad placement. Placement targeting allows advertisers to choose specific ad placements where they’d like their ads to appear. An ad placement can be an entire website or a specific sub-set of ad units within that site.

Of course you can use the recently launched Ad Review Center to filter specific placement-targeted ads. But I suggest you give this new option a try and track using channels to see if the your Adsense ad units are now making more money online.

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