Digitalisation enabled by advances in technology has an enormous potential to create value for electricity market reforms by helping promote competition, security of supply, and sustainability. It contributes to the growth of the electricity sector and changes the electricity market and the way consumers can engage in it. However, besides the opportunities emerging with digitalisation, the threats of emerging digital technologies are increasing. While digitalisation can bring many positive benefits, it can also make electricity systems more vulnerable to cyberattacks. This chapter investigates digitalisation in electricity market reforms and liberalisation worldwide, specifically in ASEAN. It also discusses the potential opportunities and threats of digitalisation for electricity market reforms.