Cloud Foundry is an open-source platform-as-a-service (PaaS) that allows developers to build, deploy, and manage applications in the cloud. It provides a flexible environment that supports multiple programming languages and frameworks, making it easier for teams to focus on coding without worrying about the underlying infrastructure. With Cloud Foundry, users can quickly scale applications and integrate various services, such as databases and messaging systems. It automates many operational tasks, enabling faster development cycles and efficient resource management, which helps organizations respond to changing business needs more effectively.