This article provides a brief overview of adolescence. It highlights the key physical changes related to puberty and identifies the latest understanding of neurological development in young people. It is also recognised, within the article, that this period of rapid change can have an impact on social and emotional wellbeing. There are conditions that typically have an onset during adolescence, examples of this are offered. The term ‘adolescence’ is used to describe the stage of development and growth and ‘young people’ is used throughout to refer to the individuals.