Search engines use a number of factors in scoring, and these factors are adjusted all of the time based on new algorithms, tests, and other criteria. Search engines keep the details of these scoring factors secret. Never have hyperlinks like "click here", hyperlinks should always be keywords, long hyperlinks with multiple keywords are even better. A sitemap is a file that tells exactly how crawlers should crawl your website. For example, if there is a page that does not get linked to your website but you still want the crawler to crawl it then you would simply include it in your sitemap file to tell the crawlers that there is something important there. Twenty years ago, the World Wide Web as we know it today didn