How do search engines differ from directories, announcement sites, and guides on the Web?
Directories: The main difference between a search engine and a general directory is that a directory will not list your URL if you do not register it with them. They do not make use of indexing software agents and so have no way of knowing it’s out there. As a result, their registration form will be considerably longer than just your URL. Directories are usually subdivided into categories and you have to submit your URL under the most appropriate heading. Announcement Site: The explosion of sites being added daily to the Web has created a need for announcement sites that track all of the new sites that join the Internet. Announcement sites are not only useful for Webmasters and marketers to kick-off their online promotion campaign, but also for users to keep current on what’s happening with the WWW. Depending on the announcement site, different Internet documents can be announced — new web pages, new articles as well as new resources. The time period policy also differs from announcem
