Kelkoo built its name as a shopping comparison service that aggregates product listings from participating retailers rather than selling stock directly. Its catalogue typically spans electronics, home and garden, fashion, beauty, toys, and appliance searches, which places it in the broad retail end of Price Comparison Platforms rather than specialist comparison niches. Search results are shaped by merchant feeds, so pricing, availability, and promotions depend on retailer data updates instead of editorial product testing. That makes Kelkoo most useful for shoppers who want to compare seller prices and click through to merchants, especially for everyday consumer goods and seasonal retail searches. The service is free for consumers, with the commercial side based on retailer participation and paid listing relationships common in comparison shopping engines. Compared with editorial review sites, Kelkoo puts more weight on price-led product discovery and less on hands-on buying advice, which can limit context for users researching quality or long-term value.