people as a noun is a collective group of any size - from 2 to thousands - of persons considered together as a unit. People is most often used as a plural noun to refer to a group of individuals, though it can also be used as a singular mass noun to refer to a collective group of persons.
1. We are looking for people who are passionate about the environment.
2. Many people have volunteered to help with the clean-up effort.
3. People often turn to art for comfort.
people requires a plural verb, such as 'are.' Don't use a pronoun before 'people'. For example, 'People were very excited' is correct but 'They people were very excited' is incorrect.