When a visitor has difficulty choosing keywords to find the desired site, a directory can be of great help. A directory provides guideposts organized by a hierarchical structure to help in a search. Web sites are stored within major categories, further subdivided by subcategories, which are further subdivided into topics. The main search engines also offer directories. For maximum efficiency, a metasearch engine queries several search engines at once, providing you with a wider selection and broader search.
Many search engines have a simple mode and an advanced mode.
Knowing a few basic rules to the advanced mode can be very helpful to a visitor wishing to better define their search. Many webmasters utilize mass registration to quickly deliver their URL and keyword information to the major search engines and directories. Because search engine referrals are critical to obtaining site traffic, webmasters must be sure strategic keywords appear in the crucial locations on the web pages. The page title is most important. The effective doorway page technique is to use only 1-3 keywords per page and target the keywords for Top 10 search engines.