Basic Seo concept: What is dead link?

Dead LinkThe Error 404 page is returned from the server.

The possibility of a dead link:

• Dynamic links become dead links when the database is no longer supported.
• When a file or webpage is moved, the link pointing to it becomes a dead link.
• When the webpage content is updated and changed to another link, the original link becomes a dead link.
• The website server is set incorrectly.

From the user's point of view, dead links and error links are the same, so we generally do not need to distinguish between dead links and error links.

As Seo personnel or website administrators, we should avoid the occurrence of dead links on the website, because the number of dead links can be used to evaluate the authority of a website.

Currently popular dead chain test tools: Firefox plug-ins; checkpagelink

How to Create a 404 error page

Page 404The purpose is to tell the viewer that the requested page does not exist or the link is incorrect, and guide the user to use other pages of the website rather than close the window to exit.

Many open-source systems, including CMS and blog systems, do not provide 404 pages or provide 404 pages, which does not meet the SEO requirements, which greatly compromises the website's authority.

404 what effect should the page achieve to meet Seo requirements?

The search engine uses HTTP status codes to identify the status of webpages. When the search engine gets an error link, the website should return a 404 status code, telling the search engine to discard the index of the link. If a 200 or 302 status code is returned, the search engine creates an index for the link, which leads to a large number of different links pointing to the same webpage content. As a result, the search engine significantly reduced its trust in the website. -- This problem exists in many websites: The 404 page returns the 200 or 302 status code instead of the 404 status code.

The correct method for setting up the 404 page is as follows: (only applicable to Apache servers)

• Add code to the. htaccess file: errordocument 404/error.html
• Create a simple html404 page named error.html
• Place error.html in the website root directory
• If you encounter any difficulties, refer to this site: the error webpage, Seo 100,000. htaccess file.

Note:

• Do not direct the 404 error to the home page of the website, which will cause the Home Page not to be included;
• Do not include the primary domain name before/error.html. Otherwise, the returned status code is 302 or 200.

For more details, click"Dead Link"

From: http://www.seowhy.com/