Keywords: Addiction/Substance Use, Adolescents (13-19 years), Behaviour Modification (e.g., provision of item/tool, incentives, goal setting), Clinic, Education / Awareness & Skill Development / Training, Grade school aged (5-12 years), Health Care Setting, Meta-analysis, Primary health care provider office (e.g., Public health nurse, dietitian, social worker), School, Smoking Cessation/Tobacco Use, Social Support (e.g., counseling, case management, outreach programs) , Systematic review of reviews, Youth Health