The most important thing to think about, when first thinking about any website, is the user. Like so much marketing websites are, unfortunately, too often developed inside out (company focused) rather than outside in (customer focused).
The Site Map ? Important or Not?
Have you ever visited a web site and noticed the “Site Map” button jammed somewhere near the bottom of the page? Ever click on it? Probably not. So, why do sites have site maps?
How to create a google site map
A quick search on Google for advice on creating a site map initially threw up many links to software you could buy or download for free to create a site map.
But why do you need a site map?