Breastfeeding is a high-impact maternal and child health intervention, yet global exclusive breastfeeding remains at 48% among infants younger than six months, below the 60% World Health Assembly target for 2030. At the same time, the period after hospital discharge is characterized by fragmented access to skilled lactation support, creating a strong rationale for digital health interventions (DHIs). This narrative evidence review synthesizes recent evidence on mobile health (mHealth), smartphone applications, short-message services, social media and peer-support platforms, telelactation, and hybrid digital-professional models. Particular emphasis is placed on randomized evidence and on the implications for low- and middle-income countries (LMICs). A 2026 systematic review and meta-analysis of 46 randomized or cluster-randomized trials involving 33,785 participants across 18 countries found that DHIs increased the odds of exclusive breastfeeding (OR 2.58, 95% CI 1.91–3.50; 39 trials; n=11,601), although heterogeneity was substantial (I²=83%) and certainty was very low. Breastfeeding duration showed a moderate standardized benefit (SMD 0.48, 95% CI 0.29–0.67), while any breastfeeding was not significantly improved (OR 1.09, 95% CI 0.90–1.31). Evidence suggests that digitally enabled support is most useful when it is timely, interactive, tailored, and linked to trained personnel rather than functioning as a stand-alone information repository. However, evidence on cost-effectiveness, safety, digital exclusion, implementation fidelity, and long-term scale-up remains sparse. This review argues that the next phase of digital breastfeeding support should shift from asking whether digital tools work to determining which components work, for whom, at what postpartum moment, and under what health-system conditions. Hybrid, equity-sensitive models integrated with routine maternal and newborn care appear the most defensible direction for policy and research.