Yes, ‘we’ is a noun. Specifically, it is a pronoun. Pronouns are words that take the place of nouns in a sentence. ‘We’ is used to refer to the speaker and one or more other people. For example, in the sentence ‘We are going to the park,’ ‘we’ replaces the names of the people involved.
Pronouns like ‘we’ help make sentences less repetitive and more concise. Instead of saying ‘John and I are going to the park,’ you can simply say ‘We are going to the park.’ This makes communication smoother and more efficient.