Search engines index pages through crawlers. These crawlers are able to find the pages in your site if there is a properly formatted sitemap available. The crawlers then will be able to find all the pages and index them and keep updating them as updates happen to the pages. Thus creating an appropriate sitemap is vital to getting search engine rankings and the consequent traffic to your site.
You want to get listed high enough in the search engine results to be able to draw traffic to your site; be it an ecommerce site or a blog that has been monetized etc. Search engines send out crawlers to find the pages in your site and note the updates that have happened. The more effectively this is done, higher the rankings possible. Crawlers can find all your pages of a site when there is an appropriately formatted sitemap on the web-server that you are using. This way you enable the search engine crawlers to find out what pages are present, which have recently changed, and to crawl your site properly. Sitemaps are an easy way for you to help improve your coverage in search engine indexes. Sitemaps are a big help for the visitors too who look at it to find what they need rather than look for a link that leads them to the information.
Coffeecup Sitemapper creates site maps very easily in XML and HTML, It’ll have all the pages listed and linked appropriately. To make it easy for the Google, Yahoo, ASK and Bing search engines, the software uses a similar crawler to ensure the site map is correctly formatted. When done, you can fine tune it further by editing the map. Priority and the frequency of changes can be set by the user. Upload to your site function and submission to search engines are built-in. This is a simple tool but for a vital function.