A sans-serif font is a type of typeface that does not have the small projecting features called "serifs" at the ends of its letters. This design gives sans-serif fonts a clean and modern appearance, making them popular for digital screens and signage. Common examples include Arial, Helvetica, and Verdana. These fonts are often easier to read at smaller sizes, which is why they are frequently used in web design and user interfaces. The simplicity of sans-serif fonts can enhance readability and accessibility, making them a preferred choice for many designers and businesses.