Categories, Single and Channels ....SEO
Here's some things to consider with SEO and URLs:

Readability of the url
Including keywords in the url
Shorter > longer
Fewer /folders/ in the url
Generally don't want any caps in the URL
Separate words with hyphens or underscores

So, "/particular-product-title" would be preferable to "/productCategory/particular-product"

Hope that's helpful!