Actually both Shawn May Scott and sunbun143 are correct. There is a user-friendly sitemap that you can create that serves as a quick index to pages, articles and information about the websites specifically so users can jump to specific links.
A sitemap is also a file that sits, usually in your root directory where ever you have your website housed at and is there to give the Google robots information on what content you would like submitting to Google to be considered for indexing. This sitemap is in xml format and is delivered to Google through a configure file called Robots.txt
Rank, however, depends on many other variables than how many articles or pages are submitted and is more reliant on quality than quantity.