This article presents a systematic literature review (SLR) that examines the strategic role of Digital Product Passports (DPPs) in facilitating transitions to Smart Circular Economies (SCE). DPPs are conceptualized as dynamic, interoperable digital records linked to unique product identifiers, facilitating multidimensional traceability across product lifecycles. The review synthesizes recent research on the conceptual foundations, regulatory drivers, technological enablers, life cycle integration, and organizational challenges. While European policies drive progress, barriers such as digital infrastructure, governance and stakeholder engagement persist, particularly in Global South contexts. The proposed conceptual synthesis integrates technological, organizational, market, and regulatory dimensions, with a focus on change management and collaborative governance. Key research gaps include a limited focus on downstream actors and behavioral factors. Findings suggest that realizing the full transformative potential of DPPs requires the coevolution of technology, organizational culture, and inclusive policy frameworks, supported by future studies in diverse economic and institutional settings.