Smart pricing is a google adsense / adwords feature, it is used for determining the cost of a click in content ads. Basically the cost of a single click is higher for the same keyword for sites whose visitors have higher probability of becoming a paid customer at the advertisers site. I've read that smart pricing calculations are made for the whole account instead of single site, but found no offcial word on it from google. Here's a google blog post about smart pricing : http://adsense.blogspot.com/2005/10/...t-pricing.html