The rapid expansion of digital technologies and social media platforms has fundamentally transformed consumer behaviour, particularly among university students who represent one of the most influential and digitally connected consumer segments. Students are continuously exposed to marketing messages through social networking platforms, influencer endorsements, peer interactions, mobile commerce, and personalized digital advertising, making them highly responsive to contemporary social-marketing strategies. Unlike traditional commercial marketing, social marketing incorporates behavioural, psychological, and societal factors that influence consumer decision-making while promoting products, services, and socially desirable behaviours. Consequently, understanding how social-marketing dynamics shape students' purchasing decisions has become increasingly important for marketers, educational institutions, and policymakers. This study critically examines the relationship between social marketing and student consumer behaviour through a qualitative review of contemporary literature in marketing, consumer psychology, digital commerce, and behavioural economics. The analysis investigates the influence of social media engagement, peer groups, influencer marketing, electronic word-of-mouth (eWOM), digital personalization, brand communities, and ethical marketing practices on students' purchasing intentions and brand loyalty. Furthermore, the study explores the psychological mechanisms underlying student buying behaviour, including social identity, perceived value, trust, emotional attachment, and fear of missing out (FOMO). The findings indicate that digital social-marketing strategies significantly influence students' purchasing behaviour by shaping perceptions, attitudes, and consumption patterns across online and offline marketplaces. However, concerns relating to excessive consumerism, misleading promotional practices, privacy, and impulsive purchasing highlight the need for responsible marketing approaches. The study concludes that organizations should integrate ethical marketing, consumer education, and transparent digital engagement strategies to foster sustainable consumer behaviour while strengthening long-term brand relationships among student consumers.