Unlike search engines, most directories do not compile databases of their own. Instead of storing pages, they point to them. This situation sometimes creates problems because, once accepted for inclusion in a directory, the Web page could change content and the editors might not realize it. The directory might continue to point to a page that has been moved or that no longer exists. Dead links are a real problem for subject directories, as is a perceived bias toward e-commerce sites.
Subject directories are best for browsing and for searches of a more general nature.
They are good sources for information on popular topics, organizations, commercial sites and products. When you'd like to see what kind of information is available on the web in a particular field or area of interest, go to a directory and browse through the subject categories. This page updated 10 January 2001 by Ellen Chamberlain , library webweaver.