SEO optimisiation

Hey

I try to use nopCommerce but I need to make an optimisiation on site and i have some question cuse i cant find how to do it.

I need to:

Change a url address of my own but different of site title
uniqe description for every page and product.

How Can I do it? I need some plugs?

For SEO optimization you have different settings in admin>configuration>settings>general and miscellaneous settings>SEO settings tab and admin>catalog>[categories] or [manufacturers] or [products>manage products]>add new/edit categoriy/manufacturer/product

Here are some plugins for SEO optimization