Nonetheless, there are some principles that can be applied to the creation of effective and informative WWW pages. The second is to use that knowledge to structure information on the server. Frequently requested information should be easy to locate. Information should be grouped into understandable categories to keep the number of menu entries at roughly seven or fewer so that the entire menu can appear on a single page. Use of graphics is an area of both great opportunity and great hazard.
Appropriate graphics can add interest and clarity to a page.
However, they need to be used with caution. This problem is especially acute for users with slow network connections. Although they have improved dramatically in recent years, modem connections via telephone lines are tens to hundreds of times slower than direct connections to the Internet via a local area such as an ethernet. Thus a graphic image that may take only seconds to display at 10 megabits per second, can take several minutes to display at 56 kilobits per second. Animated graphics place an additional load on the user's computer, which can significantly impact other applications.