Google adsense referrals
When I use Google adsense codes I just rely on the ads matching my content. However, Google referrals allows you to choose categories yourself and you can see how much a referral will pay.
As of June 2007, Google began their AdSense referral program (the one with non-Google products). Go to AdSense Setup > Referrals page, set your language (like Germany, English), and pick some product categories (like Entertainment and Telecommunications) or specific products. You’ll end up with a code snippet for your website as usual.
The crucial difference between referral ads and normal AdSense is that you won’t get paid per click, but only if the visitor who clicked the ad buys something from that site, too (or performs another action, like a newsletter subscription). And there’s one other layout option which normal AdSense doesn’t have: the link-only ad type, because this link will automatically adjust to your page’s font settings, and not break the text flow (and it will also not carry any Google-branding, or disclosure).
