Naturally anyone wants to be in this list. Although there is no common algorithm used by all engines, they seem to follow to some degree the same pattern. The frequency of matching keywords is another major factor for the ranking process. Next to the ranking and the title of a page this is the only information a user receives from a search engine. This mode of operation of web robots for search engines does not produce favorable results for pages using the above mentioned elements.
Most search engines see the web the same way someone using a very old browser does.
They definitely cannot analyze images or applets. They even may not read links in imagemaps or frames. Even worse if the page contains a script or a table at the beginning, the produced description of the page may have little relation to the real content of the page. To circumvent these traps HTML provides a few special elements. A web robot was launched to analyze the home pages of these 400 web sites.