The goal of faceted search is to provide your customers with a
better shopping experience. With each step, faceting delivers more relevant results, which increases the chances of conversion.
Below are the key things to make sure you're getting the most of the guided navigation.
1. Have the optimal number of facets.
It may be tempting to include as many facets as possible. Fight the urge to overeducate the user with options that are too narrow. Remember, faceted search is here to make things easy, not complicated. Having too many options can backfire and result in choice paralysis, which you don't want!
2. Enable multiple selections.
Imagine you want to buy an oversized sweater. How 'oversized' it should really be? What if you wear more than one size? Also, you want to check both white and beige color, and the sweater shouldn't cost you more than $20.
Now, imagine you would have to go back and forth to filter the products according to size, color, and price separately. You probably would leave the store without buying anything after 5 minutes.
Allowing multiple selection options as prettylittlething.com does below can instantly help your customers refine their search options.