Analysis of spiders ' grasping traps in search engines

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This picture is very image of the search engine spider in the crawl page, some unfriendly elements will affect its formation worse (note: I left the English environment has been six months, if there is a wrong explanation, do not blame.

Orphan Pages; Spider is based on the link crawl page, no link to the page, nature makes spider crawl difficult.

Unfriendly Seo-cms System; The CMS is not friendly to SEO, will form a certain interference spider, such as JS, Ajax, link distribution, frame structure and so on.

Bad server revisit, such as blocking search engine spider access, 302 redirection, access rights, and so on, and the stability of the server, can have a fatal impact on spider.

Cloaking, such as hidden text, no inside and outside the chain of pages, will cause spider problems.

Session Based Job; URL based on the visitor's cookie random transformation, the HTML code in a large number of characters, these sessions of the trouble, for a Web site does not rely on SEO may be nothing, but for a Web page based on SEO is fatal.

No processing error page, such as 404 jump.

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