Should I use a product finder or site search?

Both, for different shoppers. Site search serves visitors who can name what they want, and they convert at a multiple of browsers, so good search is worth real investment. A product finder serves the larger group who know their problem but not your products: they cannot search for what they cannot name, and your filters mean nothing to them yet. The finder asks about their situation in plain language and translates it to your catalog behind the scenes. The strongest setups connect the two, so what a shopper tells the finder also personalizes their search results. The full picture of types, matching and placements is in the complete guide to product recommendation quizzes and finders.