What is 'Define Search Results' in 'Merchandised Search'?

'Define Search Results' helps merchants to exactly control the products to be displayed for a partial or exact match of a merchandised search query using product catalog attributes & analytics from Tagalys.

In the image below, the highlighted section contains fields from the product catalog and analytics from Tagalys e.g., 7D, 14D, 30D. These fields can be used to define the search results for this particular query.