Baidu treats subdomains a little different than Google and Bing. They don’t measure subdomain as totally separate sites and give different ranking metrics, but instead they treat subdomains as more like more an organized subcategory. Therefore they inherit the root domain’s authority and weights so subdomain’s authority is directly related to the main root domain.
- Do not abuse the subdomains, A larger number of subdomains without quality contents is considered cheating.
- Do not duplicate content between 2 separate subdomains, as it will be duplicated.
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