In a piece for MarketingProfs, Clarus Commerce CEO Tom Caporaso shares tips on how to use the power of “free” to attract and retain customers. Since free stuff has appealed to consumers forever, Caporaso recommends that retail sites offer: free shipping, to take advantage of the best deal closer in the online space; free samples, to help prove a product’s value; and free trials, to entice prospects to check out a service’s benefits.