A site best feature would be recall ability. i.e. u navigate, and go thru all the site and u locate an resource or link, then again u losing it is pain.
Most of the site url which shows a catalog for example, will have an url like
catalog.jsp?pageno=5
What you see in page no 5 won't be there when you visit again. This kind of url is not sharable.
A longer url is also tough to share with others, or remember then even.
REST (Representational State Transfer) is a kind of architecture, which has stress on simple url schemes, which takes actions as part of url than part of request parameter. REST has various other aspects to it, so its simply wrong to just mentioning abt its url scheme here.
http://countme.wordpress.com/2006/10/04/affordability-pricing/
This above url speaks for itself, and most could understand when it was written, and how its organised.