"Search engine" and "Web directory" are two different search services available to the Web community; although they are often mistakenly confused. Search engines have indices that are built up by robots or crawlers; whereas Web directories build up their indices through human editors. Many search engines and directories contain both a computer-generated index and a human generated index, and are referred to as hybrids.
Now that we have a better overall understanding of the common differences between search engines and Web directories, we will discuss the details about search engines and how they work. Search engines all have their own confidential algorithms that determine which Web pages are to be shown first. The algorithms assign weights to certain components or variables that it finds within a page.
For example, many search engines consider the text within the title of the page to be deemed very important. The title of a page is considered important to search engines and is given higher weight because (1) it is displayed on the top of the menu bar in your browser, (2) the title is displayed in the search engine results page and (3) the title is displayed in your browser bookmarks when you add that page to your "favorites" or bookmarks.
Web directories should be browsed through their hierarchical structure and not searched. Humans assign titles and descriptions that might not be within the source code of the page. Also, there is normally a submission fee to be added to a directory. The submission fee is to cover the costs of having the human editors review the site. Most directories will only add a new site if it has unique content that is presented in a professional manner by a legitimate company.
Now that we have a better overall understanding of the common differences between search engines and Web directories, we will discuss the details about search engines and how they work. Search engines all have their own confidential algorithms that determine which Web pages are to be shown first. The algorithms assign weights to certain components or variables that it finds within a page.
For example, many search engines consider the text within the title of the page to be deemed very important. The title of a page is considered important to search engines and is given higher weight because (1) it is displayed on the top of the menu bar in your browser, (2) the title is displayed in the search engine results page and (3) the title is displayed in your browser bookmarks when you add that page to your "favorites" or bookmarks.
Web directories should be browsed through their hierarchical structure and not searched. Humans assign titles and descriptions that might not be within the source code of the page. Also, there is normally a submission fee to be added to a directory. The submission fee is to cover the costs of having the human editors review the site. Most directories will only add a new site if it has unique content that is presented in a professional manner by a legitimate company.
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