A "Font Family" refers to a group of related typefaces that share common design features. Each font within the family can vary in style, weight, and size, but they maintain a cohesive look. For example, the Arial font family includes variations like Arial Bold, Arial Italic, and Arial Black, allowing for flexibility in design while keeping a consistent appearance. Font families are essential in typography, as they help create visual hierarchy and enhance readability. Designers often choose specific font families to convey a particular mood or message in their work, making them a crucial element in graphic design and branding.