Peer groups are social groups made up of individuals who share similar interests, age, or social status. These groups often play a significant role in shaping a person's behavior, beliefs, and identity. For example, teenagers may form peer groups at school, where they influence each other's choices, such as fashion, hobbies, and even academic performance. Being part of a peer group can provide a sense of belonging and support. Friends within these groups often share experiences and challenges, helping each other navigate issues like bullying, relationships, or academic pressure. This connection can be crucial for personal development during formative years.