Typography is the art of arranging type on a page and influences the overall look more than any other visual element. Type determines the tone of a design and should be carefully selected to match the design's purpose. The document defines and explains key typographic terms including font, letterform, character, dingbat, kerning, leading, baseline, ascender, descender, counter, and x-height. Understanding these terms is essential for designers to successfully use type to communicate ideas.