404 You set it right?

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Recently, a friend asked me how to do 404, what role should be paid attention to? I have been engaged in the SEO industry for many years, before the company to help customers deal with the project will also encounter a lot of such problems. I will put some of my own experience on the site 404 questions to tell you.

Under what circumstances need 404, can be roughly divided into the following three points:

Old domain name new use:

Because some of the old domain names bought over, we can not ensure that the search engine database previously included in the old content is clean, if not cleaned so new station on the line, will certainly release the old station content, and these old content is not in the new station, this will produce 404 error, So this is also a lot of friends ask why the site is included in the previous content of the problem, for this problem please do 404 as soon as possible. There is a point even if the old domain name all the data even if the search engine clean up, however, there is no guarantee that the other sites in the network did not have the old station outside the chain, because it is possible in any site on the Internet may have appeared before the existence of old URLs, for these old URL search engines will also go to crawl, Once the visit does not exist, 404 problems may arise.

Website revision:

8630.html "> Sometimes Web site revision is difficult to avoid, if the site in the revision of the directory changes, or some of the previous content deleted, then the relative should be included in the page without the same URL to point to the words will also produce 404. In fact, the site in the revision of the resulting 404 is the most kind of situation, the best way to deal with the old content 301 to the corresponding new changes in the URL content, and then do a good job of 404 settings.

New website:

The new site to do 404 is to avoid the consequences, it can be said as long as a site needs to have 404 pages, because sometimes we can not avoid the production of dead chain, even if there is no dead chain to do 404 is also a good preventive work.

Site setup 404 Things to Note:

Note that it is important to make sure that nonexistent pages not only return 404 pages but also 404 code, because only the return of 404 code can be identified by the search engine does not exist. This problem in many cases in some virtual host, I have encountered before. While checking the page, although you see the error page, but with a tool check found that the return is 200, so we also recommend that you do 404 after the use of tools to check the correct return code.

And some individual friends in order to deliberately let the search engine feel that the page exists on the use of 301 or other steering code to jump to the homepage, this is very unwise, because this will produce a large number of repeat the first page URL exists and lead to a lot of duplicate pages.

Above is I to everybody some about 404 set up the question suggestion, hoped for everybody especially the novice friend to have the help. This article by the Retro release Net: http://igzgz.com original offer, please reprint to indicate the source of the vintage station!