In an article before Chen Nian, "Different situations of two domain name use analysis of the pros and cons," Chen Nian talked about a number of two-level domain name related issues, in fact, the choice of two domain name Baidu is given to our reference suggestions, choose to use a subdomain or directory to reasonable distribution of site content, The site in the search engine performance will have a greater impact. This article briefly to the Baidu gives the suggestion to say my understanding.
First look at Baidu's recommendations:
1. The content of a channel is not rich enough to be used as a stand-alone site before the use of the table of contents, and so on the channel accumulated sufficient content, and then converted to the form of a subdomain
A Web page can be ranked in front of the search results, "birth" is very important, if from a site with a higher weight of the site, the row to the front of the possibility of the greater, conversely the smaller. Usually the main site weight is the highest, the subweb will inherit from the main site a part of the weight, the number of inherited, depending on the quality of the subweb. Before the content is rich enough to be a stand-alone site, the content is placed in the next catalog of the main site to get a better performance in the search engine.
2. Content difference degree is big, correlation degree is not high content, use sub-site form
Search engine will identify the theme of the site, if the content of the site is not high, may lead to the identification of search engine errors. Less relevant content, placed under different subdomains, can help search engine better understand the theme of the site.
3. The contents of the domain to do the right, separated from each other, a.example.com content, can not be accessed through b.example.com
The contents of the subdomain can be accessed by each other, and may be processed by the search engine as a duplicate content, and the reserved URL is not necessarily under the normal domain name.
4. Do not abuse the sub domain name
No rich content and misuse of a large number of subdomains, will be the search engine as a cheat behavior and be punished.
The first one: the message I get is not to take the form of a subweb until the content is not rich enough. This rich scale is really difficult to say, it seems to rely on experience, how to SEO helpful on how to come. Ranking to see the origin, usually the weight of the main site is higher than the son station, so the same keyword is more likely to rank forward, of course, can not be absolute. For example, it is possible that the son station is higher than the weight of the main station, or the same keyword in the sub-station to obtain a higher weight transfer, its ranking will be more forward.
Second: If the relevance degree is not high, the search engine error identification means that the whole station subject may be wrongly judged. For example, it is a mother and child information station, the next column has agricultural knowledge, financial knowledge, and so on and other irrelevant content, will let the search engine can not determine what you provide content. At this time with the subdomain independent will be conducive to the search engine judgment, is a search engine friendly performance, but also improve the user experience degree of performance.
Third: The content between subdomains to avoid access to each other. My understanding is that two non-primary domain name of the two-level domain name between the article page can not access each other, easy to be judged as cheating, because it is to vote for each other to do weight transfer, two is so easy to create 2 times crawl, resulting in search engine error judgment. To continue to understand its meaning.
Fourth: A large number of misuse of subdomains may be judged by search engines as a way to increase the weight, to upgrade the ranks of the station group built.
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