Web site optimization Easily overlooked two page jump

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In search engine optimization, there are two questions about page state jump, generally easy to be ignored. 301 Jumps and 404 error pages.

301 Jump is to permanently redirect the page to another page, at the same time will be the original jump domain name weight, included some data transfer to the target jump page. Therefore 301 jumps are often used in xxx.com jump to www.xxx.com, and when the site changes the domain name. For search engines, xxx.com and www.xxx.com are two sites, we generally understand www.xxx.com as well as domain names, in fact, XXX.com is the first class domain name. Www.xxx.com, bbs.xxx.com belong to level two domain name. The search engine collects and assigns the weight the time xxx.com and Www.xxx.com's data is different.

404 error page, is to search engine crawl page when prompted search engine and user current page for error page, the only requirement of 404 page is return status must be 404 error code, not 200 or 302, avoid search engine repeatedly try to crawl error page. The default 404 pages of Apache and IIS are simple and not in line with the user experience and are easily lost. Therefore, it is also important to build a friendly 404 page, it is recommended not to automatically jump back to the page, you can add referral information, search box to help users solve the problem.

How the Linux environment is set up in Apache:

Domain name redirection State detection

Http://www.ranknow.cn/tools/redirectcheck

404 Page Return status detection

http://www.ranknow.cn/tools/checkhttpcode404

SEO various query Tools

http://www.seoegghead.com/