This document discusses the use of social marketing and digital technologies to facilitate behaviour change. It defines social marketing and differentiates it from education and social advertising. Smartphones and apps are increasingly being used as they allow for personalized, tailored interventions that facilitate self-monitoring and peer support. Case studies on apps that promote breastfeeding and smoking cessation in pregnant women showed positive behavioural outcomes. A proposed digital strategy to reduce energy consumption among low-income households focuses on an experiential learning approach using gamification, feedback and rewards.