This document provides information and examples about the usage of definite and indefinite articles (the, a/an) in the English language. It explains that the definite article is used for specific or particular nouns, previously mentioned nouns, nouns where only one exists, and with superlatives. The indefinite article is used to introduce new countable nouns. No article is used with uncountable nouns, plural nouns used generally, places like cities and continents, and in certain prepositional phrases.