Digital education is rapidly becoming a key factor in driving sustainable development in India, especially for SDG 4, which aims to ensure everyone has access to quality education and lifelong learning. Major national policies like NEP 2020, along with initiatives such as DIKSHA, SWAYAM, and PM e-VIDYA, place technology at the centre of building a more equal and strong education system. However, significant challenges remain, including deep digital divides, uneven infrastructure, and large income gaps. This article reviews recent research and policy to examine how digital learning is being adopted in Indian schools, how much it is contributing to sustainable development, and what obstacles still need to be addressed to make digital education truly inclusive, practical, and adaptable for all.