If I have a site with numerous subcategories would it be better to have one domain with each subcategory linking off it, or a domain for each subcategory?
For example, if it's a sports news site, it might be something like:
sportsnews.com sportsnews.com/football-news sportsnews.com/cricket-news sportsnews.com/tennis-news
The idea would be that there's an overall common layout to the sites, but the content and theming is different.
The alternative approach would be something along the lines of:
sportsnews.com footballnews.com cricketnews.com tennisnews.com
From an SEO point of view, is it best to have the one site with the rest linking off it so all the links to it are driving up the page rank collectively, or would it be best to have separate domains so that the domain, meta, title and description of each individual site all match up to the expected search keyword of
(sport name) news?
If the latter approach were chosen, would linking to the individual domains from the primary one then be detrimental to the overall network of sites?
Edit: Please note that sports is just an example. You can assume that although the subcategories are related 95% of users will not be interested in any others than the one they searched for.