Some search apps are intelligent enough to handle specific queries, for example, ones that include the color of the desired product. To understand how it is done, let's take a brief look at how the search works. By default, when a user types in the product name, the main picture appears in search suggestions. But if the user looks for "blue heels," the smart search will show the picture of blue shoes, even if the product has color swatches
and blue is not the main product picture. The most effective search engines can unearth products even with complicated colors when a user searches for "blue and silver heels," - as in the picture below.