One very important, though often overlooked, aspect of good website design involves screen resolution. When creating a website, the user's screen resolution must be taken into account. Different people use different resolutions and different monitors, and the appearance of your website can vary dramatically among them.

Screen resolutions can be set to 640x480 pixels, 800x600 pixels, 1024x768 pixels, and so on. The first number, 640 for instance, refers to the number of pixels that the monitor can display horizontally, while the second number, 480 in this case, refers to the number of pixels that can be displayed vertically. As the resolution increases, with 1024x768 pixels for instance, the elements on the screen appear smaller.