This feature is available by default in WordPress, But OpenCart does not have this feature.
We have implemented this feature for OpenCart.

with opencart pretty seo links you can add product and category and brand and tag words before seo keywords.
for example:
http://your_site_domain.com/product/yourproductseokeyword
http://your_site_domain.com/category/yourcategoryseokeyword
http://your_site_domain.com/brand/yourbrandseokeyword
http://your_site_domain.com/tag/yourtagseokeyword

Quick Features:
add product keyword before product seo keyword.
add category keyword before category seo keyword.
add brand keyword before information seo keyword.
add tag keyword before tags seo keyword.
Works with OpenCart 2.x.x.x and OpenCart 3.x.x.x
Increase Seo Score of your website.

Fully Compatible with Opencart 3.x.x.x & Opencart 2.x.x.x
DEOM:
please click to view demo..