This study, titled 'Leveraging Digital Twins for Enhancing Building Energy Efficiency: A Literature Review of Applications, Technologies, and Challenges', examines the role of digital twins in enhancing building energy efficiency, a key strategy in reducing global energy consumption and CO2 emissions. 

Through a systematic literature review and bibliometric analysis, the study explores digital twins' contributions to real-time monitoring, predictive modelling, renewable energy integration, and maintenance. It also addresses challenges like interoperability, scalability, and privacy. 

The work identifies emerging trends, research gaps, and provides insights to support the future adoption of digital twins in building sustainability, emphasising their importance in intelligent energy practices.