Digital Health Technology (DHT) encompasses a wide range of applications and interventions with the potential to address health needs within an increasingly ageing population. Older people's engagement with DHT depends on many factors and this commentary summarizes current understanding of the barriers and facilitators to DHT uptake and continued use among older people. It is evident that older people's confidence in using digital technology, their perceptions of personally benefiting from DHT, its design, and the available support from health professionals and carers with using DHT, all influence engagement. Understanding these barriers and facilitators among the older population creates opportunities and solutions to enable greater numbers of older people to benefit from DHT. This paper provides information to those who work with older people and design digital health interventions for older people, to consider and address factors that influence their engagement with these important and rapidly evolving health and care innovations.