A site map (or sitemap) is a list of pages of a web site accessible to crawlers or users. It can be either a document in any form used as a planning tool for Web design, or a Web page that lists the pages on a website, typically organized in hierarchical fashion.
Sitemaps make relationships between pages and other content components. It shows shape of information space in overview. Sitemaps can demonstrate organization, navigation, and labeling system.
Website Sitemap Chart with Links
Link for site map will also be added in the website footer and on click it will open sitemap on website page. You can expand and shrink nodes on click when you have many pages it can help you a lot. For the SEO purpose also you can use that.