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About Search Engines Search Crawler or Spider The
search crawler or spider visits a web page, reads it, and then
follows links to other pages within the site. This is what it
means when someone refers to a site being "spidered"
or "crawled." The spider is programmed to return to
the site on a regular basis. The more frequently the sites are
crawled, the more up-to-date the search results are. Everything
the spider finds goes into the second part of a search engine,
the index. The index is like a database that contains the information
the spider found during its crawl. Whenever a user enters a keyword
or keywords into the search box, the search engines searches through
the index to find the word(s) or phrase and returns the matching
results. Examples
of Search Engines:
Directories Directories
are created by a person who actually creates your website's listing
on the search page, as opposed to a 'robot' or 'spider' to do
this automatically. A short description and the url to your website
is submitted to the search engine owners. If approved, the “search
owner” then assigns your website to an appropriate category
or categories within the large search website. Directories
often provide much more targeted results than search engines.
A search for the directory site looks for matches only within
the descriptions submitted -- not information found on your web
pages. To update your web sites description, you typically submit
an online update to the search engine's webmaster. Examples
of Directory Searches:
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(c) 2KO
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