Social media are changing the way people are exposed to products with addictive potential – including gambling. This chapter provides a brief overview of the way digital technologies like social media are changing the gambling landscape and their relationship with gambling harm. Traditional approaches to gambling harm reduction have largely failed to recognize and address many of the systemic factors that shape the environment in which gambling harm occurs, such as promotion of gambling. Greater regulatory attention is needed to prevent social media from contributing to harm, especially among vulnerable groups such as minors and people experiencing gambling problems.