A common web site is a website that is widely used and visited by many people. The term 'ATTIC' is a five-letter word that can be used to describe such a website. An ATTIC is a space in the upper part of a house, usually used for storage, and can also be used metaphorically to refer to a place where old or forgotten things are kept. In this context, an ATTIC can be used to refer to a website that has been around for a long time and is still popular.