Is the second-level domain or the first-level directory?

It’s good to say that the substation is surrounded by the main station. I want to ask questions about the substation.

Is the authority of the sub-station (second-level domain name) larger than the first-level directory of the website?

Does the search engine treat the substation as an independent station or is it considered a primary directory?

If it is treated as an independent station, then the content of the main station will be less, will the traffic count into the main station?

This is a very good question. To do search engine optimization is to work harder in this detail.

The search engine treats the second-level domain as an independent site, that is,




It is two separate websites.

Of course, the primary directory (subdirectory)


It’s purely its superior directory website


Part of it.

By the way, is actually the second-level domain name of

If you leave the other factors alone, just look at the two URLs.



Second-level domain name


The authority is slightly higher because the search engine will treat this URL as the home page of the site. In addition, many people observe that the primary domain name often passes a small amount of trust (it is trust, not PR) to the second-level domain name.

So in terms of the URL alone, the second-level domain name is slightly higher than the one-level directory.

But from an SEO perspective, I recommend using a subdirectory instead of a second-level domain.

The second-level domain name and the main domain name are two completely different websites. You want to promote two websites. All the online marketing work must be done again. The website PR value and trust degree will be dispersed by these two independent websites. .

The use of a second-level domain name will increase the number of websites, but at the same time make the website smaller, the sub-directory will make a website bigger and bigger. The premise that search engine optimization is very important is the quality and strength of the website content and the website itself. The size of the website is an important indicator. The bigger the website, the more content it contains, the more help it has for users, and the more trust it accumulates.

So I tend to use subdirectories when doing website. The premise is that the entire website theme is closely related.

Of course this is only in terms of search engine rankings. In many cases, due to other considerations, the second-level domain name has to be used. For example, the company’s product line is more, and the difference between product lines is relatively large, then different product lines can use different second-level domain names.

Sometimes international companies use different second-level domain names in different countries. For example, the Chinese branch uses, and the Singapore branch uses

For a small and medium-sized business, my advice is to put everything in the directory as much as possible to form a large website.

Reader asks

Excuse me, the use of a stand-alone server is definitely better than a virtual machine. The problem now is that for a standalone server, because the ip is fixed, is the site structure good for sub-directories or second-level domains?

The IP address has no effect on this situation. Generally, I will still use the subdirectory.

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