One embodiment provides a system for building store product finders. The system may include: a product search engine to find products matching at least one product subcategory of product subcategories of a store product category for a store product finder, and a dominant product subcategory determining device to determine a dominant product subcategory. Each product subcategory has a product coverage. The dominant product subcategory has a highest product coverage among the product subcategories. The system may also include a filter installing device to install at least one product search filter into the store product finder.