I understand that
http://www.example.com/product
and
http://www.example.com/product/
can actually be seen as 2 different URLs and is probably best avoided for SEO purposes, but how does this affect querystring parameters. Which is better (or even 'legal')?
http://www.example.com/product?source=googleps
or
http://www.example.com/product/?source=googleps
Do you need the trailing slash before the ?