The document discusses different types of adjectives including numeral adjectives and adjectives of quantity. Numeral adjectives describe nouns by indicating an exact or approximate number, and can be definite, indefinite, or distributive. Adjectives of quantity indicate an approximate amount rather than an exact number and are used with uncountable nouns. The key differences are that numeral adjectives are used with countable nouns while adjectives of quantity are used with uncountable nouns.