Advanced Search provides an easy way for people to search your catalog by entering what they are looking for directly into a form. Because the form contains multiple fields, a single search can include several parameters. The result of the search is a list of the products which match the values entered in the form. The link to Advanced Search is in the footer of your store.
Each field in the form corresponds to an attribute from a product record. You can determine which fields to include by setting the attribute frontend properties to “Include in Advanced Search.”
As a best practice, you should include only the fields that your customers are most likely to use to find a product, because using too many can impact the speed of the search.