Key technologies pivotal for developing smart cities include the Internet of Things (IoT), big data analytics, cloud computing, and artificial intelligence (AI). IoT devices collect real-time data from various urban infrastructure components, such as transportation systems and energy grids, enabling better management and optimization. Big data analytics processes this information, providing insights into urban planning and resource allocation. Cloud computing facilitates scalable data storage and processing, while AI enhances decision-making through predictive modeling and automation. Together, these technologies work synergistically to improve urban living, enhance sustainability, and streamline city services.