OK, I admit defeat. Brief:
talk about 404 issues today, recently read a very interesting website found in the process of case, the site was filled with a lot of junk information, it is found that after the timely delete, this point is worthy of recognition. Under normal circumstances, the normal site will automatically return 404 status code, search engine update and delete, to avoid the negative impact on the users of the website and search engine. The only problem is that the site only delete the content, not any of the main content page is preserved, not 404. Of course, there is a 200 status code returned to normal websites only delete the content after the reminder "the content has been removed, but it is not. At present this collection can be found in URL 200 贵族宝贝cang.baidu贵族宝贝/Lee/snap/3b0a0cc8e7d7899facd36fad.html still returned to normal, and the consequences: the search engine will cost a lot of resources in this page is invalid, then the same loss used on important page resources will be a lot of crowding, as can be imagined, high quality page will be affected in some performance of search engine. After many communication we operate under the students still further processing. I think, in twenty-first Century second for ten years, should no longer exists this problem.
404 "Not Found" on behalf of the status code, spider update will think this page has expired, then it will delete the index library, the short term spider again found that the URL will no longer grab. Therefore, out of two problems: first, "temporary open; second, never open the page. For the first.
for the 404 page, Lee lists two categories, one is "temporary open; two, always can not open the page. For the first problem, suggestions don’t immediately return 404, but the use of 503. For the second problem, always can not open the page, do not consider the 404. The various class web2 page to delete also need to return 404 to inform the search engine the page has expired.
station network (www.admin5贵族宝贝) May 6th news today, love Shanghai Webmaster Platform Lee issued a document on the website, talked about 404 pages for search engines. Lee said there is no main contents do not 404 pages, search engines will cost a lot of resources in this page is invalid, the same loss used on important page resources will be a lot of crowding, high quality pages will be affected in some performance of search engine. Lee does not have any value to delete the contents of the page after the death of direct processing and return 404, and in the love of Shanghai Webmaster Platform submitted sitemap submission tool chain chain.