Human geography is a major branch of geography that studies the world, its people, communities, and cultures with a focus on their relationships with and across space and place. It explores the interrelationships between the physical (natural) environment and the socio-cultural environment created by human beings.
According to Friedrich Ratzel, "Human geography is the synthetic study of relationships between human societies and the earth's surface."
Essentially, it investigates how human activities affect and are influenced by the Earth's surface.