Primates are a group of mammals that includes humans, apes, monkeys, and other related species. They are distinguished by their relatively large brains, complex social systems, and primarily upright posture. Primates are highly adaptable, with a variety of species occupying a wide range of habitats and geographical ranges. They are widely studied for their importance in understanding human behaviour and evolution, and have also been valuable in medical research, particularly in the fields of vision and neurological development. Primates play vital roles in their ecosystems as keystone species, helping to regulate biological diversity. They are also important in non-consumptive uses such as ecotourism and research, leading to increased conservation efforts for threatened and endangered species.