This meaning refers to all humans or persons as a group. We use 'people' to talk about groups of humans generally or in everyday life.
People are walking in the park today.
Many people like to eat apples.
This meaning focuses on a specific group of humans who share the same nationality or ethnicity, such as a nation or tribe.
The Scottish people are proud of their culture.
Native people live in this area.
Here, 'people' means all the residents of a specific place like a town, city, or country.
The people of New York work very hard.
People in this town are friendly.
This meaning refers to a named ethnic or cultural group, often using the adjective form to show who they are.
The Jewish people have a long history.
The Maori people live in New Zealand.
This usage means all humans worldwide, or the whole human species.
All people need clean water to live.
People have lived on Earth for thousands of years.
This meaning is a casual way to talk to or about a group of persons, often friends or an audience.
Hello, people! Let's start the class.
People, please listen carefully.