Livestream shopping has emerged as a dominant force in e-commerce, blending real-time interaction with digital retailing. This paper systematically reviews 40+ empirical studies to identify the key drivers influencing consumer engagement and purchase intention in livestream shopping. Using Stimulus-Organism-Response (S-O-R) Theory, Trust Transfer Theory, Social Presence Theory, Perceived Value Theory, and Relational Bond Theory, this paper explores the impact of trust, entertainment, interactivity, impulse buying, scarcity marketing, social commerce integration, ethical branding, and IT affordances on consumer behavior. Findings indicate trust and social presence are stronger than price promotions in driving long-term engagement, while philanthropic marketing and immersive experiences enhance brand loyalty. This review provides theoretical insights and managerial recommendations for brands, e-commerce platforms, and influencers seeking to leverage livestream commerce effectively.