People who gamble can experience harm. Gambling advertising can increase gambling-related harms. This article summarizes research evidence on the impact of gambling advertising. The authors conducted an umbrella review of previous systematic reviews. A total of eight systematic reviews were included in the umbrella review. The reviews included a total of 74 unique studies, including quantitative, qualitative, and mixed method studies. Overall, the reviews found evidence of a ‘dose–response effect’. People who are exposed to more gambling advertising are more likely to feel positively about gambling. They are more likely to feel that gambling is a normal activity. They are also more likely to intend to gamble. People who are at higher risk of gambling-related problems are more aware of and more exposed to gambling advertising. Children and adolescents who see more gambling advertising have a high recall of the advertising and the brands being advertised. Those at risk of gambling problems also report a desire to gamble when viewing such advertising.
