In spite of the recent controversy on the poor accuracy of online statistics, Hitwise still produces interesting insights on overall internet clickthrough.
Moneysupermarket.com, leading loans and insurance comparator, received 13.55% of total traffic from organic search, and 20% from paid search (PPC) campaigns. While 4.2% of traffic to retail sites are now being sent by comparison shopping engines, a 17% increase relative to last year. For certain products, 90% of online shoppers use comparison shopping engines to research a purchase.
One of the keys to successful use of comparison shopping engines is being able to submit your entire catalogue through a data feed. Enclick runs data feed service for merchants wishing to outsource data feed submission and maintenance to the top dozen comparison shopping engines.