HTML was never intended to be used as a precise design tool. Much of the more useful features, such as tables, were added afterwards when the need for greater control over layout became apparent. But HTML remains an essentially inefficient tool for producing even a mildly complex page. Anyone who has experience designing in standard HTML has felt that hot rush of anger as you typed <font face="arial"> for the 534th time on the same page. Wouldn’t it make much more sense to define the font face once, and then have it apply for the entire page? Wouldn’t it be nice to have control over spacing between lines of text and even between words? How about the ability to write text rollovers in two lines of code, for the entire page? Well stylesheets give you the ability to do all of this, and much much more.