Depending on the nature and the size of the website. A sitemap is important to get all your web pages indexed, or at least found.

What is a Sitemap?

A Sitemap is nothing more than the list of all your active web pages.

Why use a Sitemap?

Easy, it allows the search engine spiders to index every web page that you want found. Also it allows your visitors to locate a web page quickly.

Be sure to have a link to your sitemap page from the main page. Then be sure to have a link to the sitemap on every web page.