The document introduces the DevNet Sandbox, which provides cloud-based labs for developers to explore, learn, develop, and test using Cisco technologies. The Sandbox includes both always-on shared labs and reservable private labs. Developers can use the labs to learn about technologies, conduct proof of concepts, develop and integrate solutions, and perform interoperability verification testing to obtain Cisco certifications. The Sandbox aims to enable rapid exploration and creation of solutions using Cisco technologies by providing ready access to lab environments.