The document discusses the difference between count and noncount nouns. Most nouns can be counted, but some like rice or sand cannot be. Noncount nouns are never pluralized and do not take indefinite articles like "a" or "one." Common noncount nouns include substances, liquids, abstract concepts, and certain meats. The document provides examples of how to use quantifiers like "many," "a lot of," "much," and "some" correctly with count and noncount nouns.