This is an OpenCart extension that aims to implement SEO best practices without any effort. A MUST HAVE for any online shop.

Currently 8 Options are supported:
1) Home Title
2) Home Description
3) Home Keywords (comma separated)
4) Page Title Format
5) Category Title Format
6) Product Title Format
7) Search/Tag Page Title Format
8) Error Page Title Format

Demo URL :
http://terrytsang.com/demo/opencart/index.php?route=product/product&product_id=47

Admin Demo URL :
http://terrytsang.com/demo/opencart/admin/
username : admin, password : admin321

YOU MUST HAVE VQMOD INSTALLED TO USE THIS.
Download vQmod here: http://code.google.com/p/vqmod/wiki/Install_OpenCart