Search filter is a tool that helps users to identify the category/ subctaegory in which the required business information the user has searched for. E.g. if you are searching for consultants, the search will fetch results from all the listings that contain the word consultants. which would rather a tiresome purpose for most users. On the right hand side of your search results window, you can find the list of all the Business / Other categories that contain the searched word ie, consultants. You may click on the respective category to find the search result. Try using the above search box.