To enable the search results filtering by product attributes values, you must first set the search filter attributes. To do it, please go to Products > Settings > Product Attributes, find the product attributes that you want to make a search filter from and check the Search Filter checkbox near it.
As soon as you check the checkbox near the attribute, it will become a search filter.
Show search filter dropdowns near the search box.
You can show the search filters near the search box or not. Please check the Show Attribute Filters checkbox in the Product Search widget edit screen to show the search filters.
When you check the Show Attribute Filters checkbox and save the widget, all the Search Filter attribute dropdowns will appear near the search field.
