Typefaces can be classified into four basic groups: serif, sans serif, script, and decorative. Serif typefaces include styles like old style, transitional, and slab. Sans serif styles include grotesque, square, and humanistic. Script styles include formal, casual, and calligraphic. Decorative styles provide more unique designs like grunge, psychedelic, and graffiti. While classifications help identify and choose fonts, too many subcategories become overwhelming for design professionals. The document examines font type classifications and styles to provide examples for font selection and pairing.