Hi Bhavin, you can still have all the different tests on a single website and might be the more efficient way to go if you have a relatively new site. Proper internal linking will help the engines understand what different sections are about (GMAT, LSAT, etc.). A lot of the decision to go with sub domains falls under the question of how large or how much traffic you are getting and your webmaster's ability to manage sub domains. For example, in seobook's case it looks like they're leveraging the original authority of the root domain to promote a sub domain (tools.seobook.com) in order to harvest more clicks in the search results.
Hi Bhavin, you can still have
Hi Bhavin, you can still have all the different tests on a single website and might be the more efficient way to go if you have a relatively new site. Proper internal linking will help the engines understand what different sections are about (GMAT, LSAT, etc.). A lot of the decision to go with sub domains falls under the question of how large or how much traffic you are getting and your webmaster's ability to manage sub domains. For example, in seobook's case it looks like they're leveraging the original authority of the root domain to promote a sub domain (tools.seobook.com) in order to harvest more clicks in the search results.