This chapter is written to explore the impact of digitalization on SDGs in G20 countries. It creates digital infrastructure index (DII) and sustainable development goal index (SDGI) as considering the digitalization and sustainable development (SD) promoting indicators during 2004 - 2022. DII and SDGI are created as employing composite Z-score method. The values of DII and SDGI are used to pronounce the comparison of G20 countries in digitalization and SD, respectively. The various forms of empirical models are adopted to assess the causal relationship between digitalization and SD. The G20 countries showed a substantial variation in digitalization and overall SDGs. Digitalization and SD showed a positive and one-way causality with each other. It is policy-oriented research and provides numerous proposals to increase digitalization and SD. It also highlights the scope of further research direction in the domain of digital technologies, digital transformation, and SDGs.