A collective noun is the word used to represent a group of people or things.
flock, crowd, committee, choir, group, team
There is often to confusion over whether to use a singular or plural verb after a collective noun. The answer is: you can use either depending on the sense of your sentence.
The audience is happy.
The audience are all wearing comedy wigs.
To avoid confusion, add a word to denote the members of the group:
The members of the audience are happy.
The members of the audience are all wearing comedy wigs.
What are nouns?
The different types of nouns
What are pronouns?
The different types of pronouns
Non-countable nouns (mass nouns)
Verbal nouns (gerunds)
Click on the collective noun: