New ad units automatically get assigned the "Unknown" category. Specific categories for ad units of the "Site" type are assigned by the bot normally within 24 hours after you embedd an ad unit on your site and start generating unique traffic. "Unknown" category is usually not targeted by CPD campaigns, so if it's the only category for ad unit it'll worsen your earnings. Don't hesistate to address support if your ad unit is older than 24 hours, it generates traffic but it is categorized as "Unknown".


To change ad unit colors you may append GET parameters. Inspect the following URL as an example. Also you can generate this code for your ad unit via the web interface at the ad unit's page.

Is it possible to insert multiple ad units on the same pages with different sizes? Can I submit the same website twice?

Yes, you can create as many ad units for a single page as you want, but it doesn't mean you will earn more. Please read this article for details.

How do to monetize traffic from dynamic pages with no set URL?

Please, check this article to know how to make traffic from pages with dynamic URLs paid better.
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