You can determine if a web page has been indexed by the search engine. Ideally the ranking relates to search engine's perception of the relevancy of each page to your query. All the search engines use the location and frequency of keywords in a web page as the basis of ranking pages in response to a query. Reviewed Indicates whether being reviewed in a search engine's associated directory can give a site a relevancy boost. As above, all search engines can determine the popularity of a page by analyzing how many links there are to it from other pages.
Some engines give pages with lots of links, or links from important web sites, a relevancy boost.
Some search engines give a boost if search terms appear in a page's meta keywords or description tags. Some site owners create target pages that automatically take visitors to different pages within a web site. The meta refresh tag is one typical way of doing this. Some search engines will refuse to index a page with a high meta refresh rate. This is the technique of placing text on a page in the same color as the background, making it invisible to human viewers.