The document discusses different types of nouns and their functions in sentences. It defines nouns as names of people, places, things, ideas, events, animals. It then describes the different jobs a noun can have in a sentence including subject, direct object, indirect object, object of preposition, predicate noun and object complement. It also defines and provides examples of different types of nouns such as common nouns, proper nouns, concrete nouns, abstract nouns, compound nouns, collective nouns, and possessive nouns.