Driven by the swift expansion of digital retail and mobile-based commerce, the competitive landscape among online shopping platforms has grown considerably more intense, elevating customer retention to a position of central strategic importance. This paper investigates the retention mechanisms that prove most impactful for online shopping websites and mobile applications, directing particular attention toward personalised content delivery, reward-based loyalty systems, gamified engagement, responsive customer assistance, targeted push alerts, and integrated multi-channel outreach. A mixed-method research design was adopted, drawing on primary survey responses from 50 participants alongside secondary evidence from established academic literature. The investigation assessed how these approaches shape key retention indicators, namely repeat purchase frequency, customer lifetime value (CLV), and churn rate. Statistical procedures including chi-square analysis, ANOVA, and multiple linear regression were applied. Results demonstrate that content personalisation and loyalty reward schemes carry the most influence over retention outcomes, whereas inadequate post-purchase support and notification overload diminish user engagement. The study further uncovers the moderating influence of demographic characteristics and technology familiarity, along with mediating roles played by user satisfaction, brand credibility, and perceived benefit. Actionable recommendations are provided to assist digital commerce businesses in cultivating sustained customer loyalty within a rapidly evolving marketplace.

Keywords: Customer Retention, E-Commerce, Personalisation, Loyalty Programs, Mobile Applications, Gamification, Customer Lifetime Value, Churn Rate, Multi-Channel Engagement