Sitemaps- you read the term on every optimization website out there but still wonder how they can help your website.
A sitemap is a map of your site is a file generated to help the Google bot find and index your pages. It allows Google to view the size of your web site, and what changes you have made. The results, faster page indexing and catch file update. In laments terms it just makes your website easier to brows.
You will find a wide variety of sitemap generators online, but most are limited to 500 pages. Some free software versions however allow you to create sitemaps of over 500 pages like G site crawler. The hardest option (but fun if you like typing out the code yourself) is using RSS or XML.
The Google webmaster guidelines recommend that you use multiple sitemaps for large websites with over 500 pages.
Tips:
There is only one way to do this and that is by using the Google webmaster tools. If you are not using the tool, I recommend registering today. The Google webmaster tools give you an overview of your site. http://www.google.com/webmasters/sitemaps