The characteristic of text rendered with a heavier, darker typeface than the surrounding plain text is referred to as boldface. It serves to visually emphasize words, phrases, or entire sections within a document. For instance, highlighting a key term in a paragraph or making a heading stand out are common applications of this typographic style.
Employing this emphasis enhances readability by drawing the reader’s attention to significant information. It aids in organization, enabling swift identification of key points. Historically, creating this effect involved physically using thicker type in printing presses; modern word processors and publishing software allow for its simple digital application.