: Should sub-domain be preferred short or long? I want to make a sub-domain but I am not sure if having a shorter sub-domain will benefit in SEO or longer sub-domain will? For example - components-of-computer.blog.com

@Jamie184

Actually, neither.

Your domain name and sub-domain name should have the following criteria at least:


Easy and natural to remember.
Retains "top of mind" recall. (comes to mind easily and first)
Has semantic value. (uses whole words that signal the topic)
Uses whole terms that mean something to a user.
Convenient to type.


While there is a lot of discussion whether a sub-domain or a sub-directory is preferred, topic is always an issue. Generally speaking, sub-directories are always better if on topic. However, if the topic is not fully complementary to the parent domain, then a sub-domain could be the answer if not another domain entirely.

The reason why I say this is two fold: one, the semantic value of the terms between the sub-domain and parent domain should make sense and send signals as to what the topic is about. For example, microcars.reallysmallcars.com or reallysmallcars.com/microcars. Since a microcar is a really small car, it should be a sub-directory, however, if you chose for it to be a sub-domain, then the semantic value of the sub-directory should explain the topic. There is no question what content can be found on microcars.reallysmallcars.com.

In your example, comp of comp.blog.com means nothing semantically. Comp is not a word and would mean absolutely nothing to a search engine or human. As well, components-of-computer.blog.com is awkward. It would be difficult to remember and type. However, components.computerblog.com or computerblog.com/components would be a significant improvement.

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