The significance of IoT devices in smart cities lies in their ability to enhance urban living through increased efficiency and improved services. These devices collect real-time data on traffic, energy usage, and environmental factors, enabling city planners to make informed decisions. IoT devices enable connected infrastructure, support smarter resource management, and enhance citizen engagement by providing tailored services. Overall, they contribute toward sustainability, reduce operational costs, and improve public safety and overall living conditions, making cities more responsive to their residents' needs.