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I am building a web application for questions and answers. Each question/answer page has all the required metadata for Facebook and Twitter, and we encourage users to share these pages.

I have a dilemma regarding the shared link structure:

Option 1 - subdomains

Use a questions.example.com and answers.example.com, followed by an ID and optional text. The text is ignored by the request, which only takes the id into account.

http://questions.example.com/<question_id>/<question_text>
http://questions.example.com/12345/how-long-is-the-queue    # Example
http://q.example.com/12345                                  # Example

Option 2 - URL path

This is the format used by stackoverflow.com and trello.com:

http://example.com/questions/<question_id>/<question_text>
http://example.com/questions12345/how-long-is-the-queue    # Example
http://example.com/q/12345                                 # Example

Server-wise, I can easily do both - I have a wildcard SSL certificate and Apache/NGinx configuration is pretty straightforward.

Which option - subdomains or URL path - is preferred for shareble links?

  • Or http://example.com/how-long-is-the-queue as ideally each question would have unique text for the name wouldn't it? – Steve Aug 20 '14 at 6:57
  • No necessarily. "yes" or "no" are pretty common answers, and "what's up" a common question - hence the unique id. – Adam Matan Aug 20 '14 at 7:06
  • Oh I didn't get from the question that people were dynamically asking questions. – Steve Aug 21 '14 at 10:19
  • Sorry for not being clear enough - updated. – Adam Matan Aug 21 '14 at 10:25
  • Don't forget to approve the answer if you like it. – Jérôme Verstrynge Aug 25 '14 at 17:19
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Both are fine, but the URL path has a slight benefit over subdomains, because the backlink juice would be concentrated on one domain. Managing one domain is also easier than multiple subdomains.

In all cases, I would put the id of the question/answer in the url, because it will make the url unique for sure.

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