The purpose of this study was to analyze the effect of digital marketing on purchasing decisions, word of mouth on purchasing decisions as well as the effect of service quality on online shop purchasing decisions. The variables studied include digital marketing, word of mouth, service quality and consumer purchasing decisions. The types in this study used quantitative survey research. This study used data collection techniques using online questionnaire methods distributed among online shop consumers. The number of samples in this study were 630 online shop consumers. The research used simple random sampling techniques. Variable measurement used a Likert scale from 1 to 5. The data analysis technique in this study implemented Structural Equation Modeling (SEM) analysis tool. The results of this study indicated that digital marketing had a positive and significant effect on purchasing decisions, Word of mouth had a positive and significant effect on purchasing decisions, and service quality had a positive and significant effect on purchasing decisions.