A collective noun refers to a whole group as a single entity but also to the members of that group.
A collective noun names a group of individuals or things with a singular form. Examples of collective nouns are: faculty, herd, team. There are collective nouns for people, animals, objects, and concepts. The use of a singular or plural verb depends on the context of the sentence. If one is referring to the whole group as a single entity, then the singular verb is best: The school board has called a special session. When a group noun is used with a singular determiner (e.g., a/an, each, every, this, that), singular verbs and pronouns are normal: The team is away this weekend; they have a good chance of winning. There are other contexts where the plural verb is more natural: My family are always fighting among themselves. When the individuals in the collection or group receive the emphasis, the plural verb is acceptable. Generally, however, in American English, collective nouns take singular verbs. In British English, collective nouns are more often treated as plurals that take plural verbs.