Cloudflare CASB (Cloud Access Security Broker) is a security solution that enables IT and security administrators to connect, scan, and monitor SaaS applications for various security issues. Cloudflare CASB helps organizations establish visibility into their SaaS security and Data Loss Prevention (DLP) posture by auditing Google Drive for data exposure and file oversharing, checking Microsoft 365 for misconfigurations and insecure settings, and reviewing third-party access for Shadow IT. It integrates with Salesforce and Box, allowing IT and security teams to scan these SaaS environments for security risks.