[Yahoo! Shopping] (http://shopping.yahoo.com/) provides search functionality and comparison-shopping tools for users to find, research, compare, and buy products online. This property also provides a suite of merchant ratings, product review, and research tools compiled by user-generated and third-party sources.
[Kelkoo] (http://kelkoo.com/) provides product search functionality and an online comparison shopping service with operations in 10 European countries and also powers the Yahoo! Shopping services in Australia and Taiwan.
Yahoo! Shopping generates revenues from merchants when users click-through to their Websites and/or through a revenue share of the final selling value when users purchase products.