Provide a site structure with strong functionality, which helps encourage link building. Linking to both trusted outside sources and internal content shows a search engine you care about users getting the best data around their query. In addition, HTML sitemaps ensure a good user experience and help search engines discover all your pages and content. Sitemaps do not offer all of the essential pieces of information however. So ensure that you have in place a means in which the site can be searched by visitors once they have found your site. This will help the visitor experience and overall functionality of the site.
SayingItFirst