Tourism and events are transforming through creative techniques that enhance visibility, engagement, and participant experiences, with digital marketing playing a pivotal role in this evolution. This study analyzes the impact of digital marketing on event and city recommendations, emphasizing their interdependent link. Data were gathered from 400 attendees and participants of the Santa Tecla event in Tarragona, Spain, employing in-person and online surveys. Multiple regression, simple regression, and ANOVA analyses were utilized to evaluate 12 hypotheses. The results indicate that digital marketing substantially affects event and city recommendations, with both elements exerting mutual influence on each other. The study also emphasizes how demographic factors, including income levels and travel patterns, influence these effects. Income levels substantially impact digital marketing, event, and city recommendations, whereas visiting patterns affect event and city recommendations but do not influence digital marketing. These data provide practical implications for event organizers and tourism marketers, highlighting the necessity for targeted methods to engage various demographic segments. This research enhances the theoretical comprehension of digital marketing’s significance in tourism and offers practical recommendations for improving event promotion and destination branding.