"Typography is the visual component of the written word," says Typography Practical Typography. Typography is used in all visually displayed text, whether on paper, screen, or billboard. It includes both typeface design and type arrangement (the selection of sizes, shapes, weights, and colors of letters for a given text). In print media, typography is also responsible for presenting information on pages that are not entirely composed of text. For example, tables and illustrations are usually included to help organize and present information more effectively. These elements are referred to as non-textual components. When you read online articles or books, you are reading text with different types of non-textual components attached. For example, an illustration might be placed where there is text to highlight something important about the topic being discussed or shown. A table could be used to list terms from a dictionary for easy reference. These non-textual components help readers understand the content better by giving them additional clues as to what is important and how the writer thinks they should interpret the text. In web design, typography is the art and science of selecting, arranging, and designing typefaces and other fonts for optimal presentation. This involves choosing typefaces and other font features that match the intended audience and purpose while still looking good together.