All websites should have primary (or main) navigation. Primary navigation is typically a list of prominent links toward the top of the page, with titles that help users determine where they want to go from wherever they are on the site. The primary navigation features the parent pages of a website, which are typically broad topics leading users to related, more detailed, child pages.
Understanding the type of people who visit your site is a very important task because you can use that information to enhance your site to suit them.