CASB (Cloud Access Security Broker) is a cybersecurity solution for controlling user access to cloud applications. It provides visibility and control over cloud usage activities, including data security, compliance, and threat protection. It helps organizations monitor and protect their sensitive data in the cloud through authentication and encryption. CASB enables administrators to configure policies to control which users have access to what data, as well as how they use it. With CASB, organizations can ensure their cloud applications are secure, compliant with industry regulations, and remain resilient against cyber threats.