ZipSearch has an option called 'Concept Map' that allows users to interactively and visually explore related concepts to help obtain better search results. On this page is an EBSCO provided video tutorial and a written description of how to use the concept map. You may see terms like 'EDS' or 'EBSCO Discovery Service.' These are just other names for ZipSearch.
Video Tutorial on how to use Concept Map in ZipSearch