Our study will follow 1,000 Australians as they transition from age 15 to 18 to identify how the modern experience of alcohol availability, acceptability and attractiveness (e.g., social media marketing, online sale and delivery) impacts on young people and their health. Partnering with young people, governments and other services, we will provide evidence to shape alcohol policy and programs that are responsive to young people’s needs and effective in improving health and wellbeing.