The phrase "teen girls" refers to females who are between 13 and 19 years old. This age group is often characterized by physical, emotional, and cognitive changes that occur during adolescence. Teenage girls may experience hormonal fluctuations, puberty-related body changes, and increased awareness of their social environment. They are also at a stage in life where they begin to develop their own identity, form romantic relationships, and establish independence from their families. The phrase "teen girls" can be used broadly to refer to this age group or more specifically to describe certain behaviors or experiences that are common among teenage females.