Wu, K. and Chi, K. 2024. Enhanced E-commerce Customer Engagement: A Comprehensive Three-Tiered Recommendation System. Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online). 2, 3 (Jan. 2024), 348–359. DOI:https://doi.org/10.60087/jklst.vol2.n2.p359.