Intro to Search Engine Optimization

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Crawler-Based Search Engines
Crawler-Based search engines, such as Google, create their listings automatically. They crawl or spider the web, then people search through what they have found.

If you change your web pages, crawler-based search engines eventually find these changes, and that can affect how you are listed. Page titles, body copy and other elements all play a role.

Human-Powered Directories
A human-powered directory, such as the Open Directory, depends on humans for its listings. You submit a short description to the directory for your entire site, or editors write one for sites they review. A search looks for matches only in the description submitted.

Changing your web pages has no effect on your listing. Things that are useful for improving a listing with a search engine have nothing to do with improving a listing in a directory. The only exception is that a good site, with good content, might be more likely to get reviewed for free than a poor site.

The Parts of a Crawler-Based Search Engine
Crawler-based search engines have three major elements. First is the spider, also call the crawler. The...

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