This research aims to analyze the influence of promotions and customer experience on purchasing decisions with ratings as an intervening variable among Lazada marketplace users among BP 22 UPI "YPTK" Padang management students. The method used is Structural Equation Modeling (SEM) with SmartPLS based on data collected through questionnaires from 100 respondents. The research results show that a). promotion has a positive and significant effect on ratings, b). customer experience has a positive and significant effect on ratings, c). Promotion has a positive and insignificant effect on purchasing decisions. d). customer experience has a positive and significant effect on purchasing decisions, e). ratings have a positive and significant effect on purchasing decisions, f) ratings are able to mediate the relationship between promotions and purchasing decisions. g) ratings are able to mediate the relationship between customer experience and purchasing decisions..