Cloud development is a modern approach to building and managing applications using cloud-based services and infrastructure. One of its main objectives is scalability, which means applications can automatically grow or shrink depending on the number of users or workload. For example, cloud platforms like AWS, Azure, and Google Cloud offer auto-scaling and load balancing tools that adjust resources in real-time, ensuring the app performs well even during traffic spikes. Another key goal is cost efficiency. Instead of buying expensive servers upfront, developers can use a pay-as-you-go model, only paying for what they use. Services like serverless computing and spot instances help reduce costs even further by optimizing resource usage.