Defining Relevant Content Area Based on Category Density

A method for defining a relevant area for displaying advertisements based on a category of a user search is disclosed. The method includes receiving a search request from a user; determining a business category based on the search request; determining a location associated with the search request; determining business category density information based at least on the determined business category and the location associated with the search request; determining an extent based on business category density information for the location; determining local content to provide to the user based at least in part on the determined extent, the business category, and the location; and providing for display to the user the local content, wherein the local content is provided to the user in addition to the search results. The location may be explicitly included in the search request, associated with responsive search results, or associated with the search request.