Disclosed herein are one or more embodiments that facilitate selection of keywords for bidding by an advertiser having a website. One or more of the disclosed embodiments may process a click-through log to determine measures of competitiveness for a plurality of websites extracted from the click-through log. Also, the one or more disclosed embodiments may, for one of the websites, determine a ranking of competing websites based at least in part on the measures of competitiveness. The ranking of competing websites may be used to facilitate selection of keywords for bidding.