This research aims to determine the impact of social media promotions on purchasing decisions at Jetiga Ala Cafe. This research uses quantitative methods, with non-probability sampling techniques and sampling using accidental sampling. The population in this study was 188 cafe-style Jetiga Instagram followers with a sample size of 128 respondents used in this study. Based on the data obtained, the calculated t value is 10.196 with a significance of 0.000 <0.05. It can be concluded that social media promotion has a positive and significant effect on purchasing decisions, and based on the coefficient of determination test, the R Square value is 0.452 or 45.2% of the purchasing decision variable. influenced by social media promotions while the rest is influenced by other factors not discussed in this research.