: A classification method that describes a font's visual characteristics (e.g., weight, serif style) using a 10-digit number.

: If a document requires a font that isn't on your computer, PANOSE looks for a match with similar numbers. Because Arial is a standard system font, it is often the "Default" choice for substituting sans-serif typefaces. Official Ways to Get Arial

Here’s the breakdown:

Arial is a sans-serif typeface designed by Monotype in 1982. It was created to be a more legible and modern alternative to traditional serif fonts. Arial is known for its clean lines, rounded shapes, and uniform stroke widths, making it a popular choice for digital and print media. The font family includes various weights and styles, such as Arial Regular, Arial Bold, Arial Italic, and more.