When I teach a course or give a consultancy for a customer, I've got the question frequently: what's the difference between the "site" and "page"? It's difficult to say that. It's difficult to say that to everybody, including also end users who aren't IT workers.

According to my experiences, everybody likes the spectacular metaphors. So I've found a quite simple metaphor, which describes the differences and the connections as well between sites and pages.

Imagine a big ball made from glass - this is the site. We can have some things inside this ball: lists, libraries, etc. But the surface of this ball is humid, we have to clean this if we want to see in. These dehumidified "windows" are the pages, showing some view to the content of the site-ball.

Certanly, we can have more pages (windows). Through these pages we can see several aspects of the ball's content...