Search Engine Getting indexed the leading search engines, such as
Google, Bing and Yahoo!, use crawlers to find pages for their
algorithmic search results. Pages that are linked from other search
engine indexed pages do not need to be submitted because they are found
automatically. Some search engines, notably Yahoo!, operate a paid
submission service that guarantee crawling for either a set fee or cost
per click. Such programs usually guarantee inclusion in the database,
but do not guarantee specific ranking within the search results. Two
major directories, the Yahoo Directory and the Open Directory Project
both require manual submission and human editorial review. Google offers
Google Webmaster Tools, for which an XML Sitemap feed can be created
and submitted for free to ensure that all pages are found, especially
pages that are not discoverable by automatically following links.
Search
engine crawlers may look at a number of different factors when crawling
a site. Not every page is indexed by the search engines. Distance of
pages from the root directory of a site may also be a factor in whether
or not pages get crawled.
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