A "teen" refers to a young person who is between the ages of 13 and 19. This stage of life is often marked by significant changes, both physically and emotionally. Teens are exploring their identities, forming friendships, and discovering their interests. They may be in middle school or high school, where they experience new challenges and opportunities. During the teenage years, individuals often face pressures from peers and society. They may be influenced by trends in fashion, music, and social media. This period is crucial for personal development, as teens learn to navigate relationships and make decisions that will shape their futures.