Microsoft Defender for Cloud Apps (formerly Microsoft Cloud App Security) can be used to monitor user activity across SaaS applications in Azure and Microsoft 365, detect risky behavior in real-time, and align with Microsoft's security benchmarks and architectures. It acts as a comprehensive SaaS security solution, going beyond traditional CASB capabilities to provide full visibility and control over your SaaS environment.
In essence, Microsoft Defender for Cloud Apps provides a comprehensive solution for securing SaaS applications in Azure and Microsoft 365, aligning with Microsoft's security benchmarks and reference architectures by offering real-time threat detection, data protection, and access control capabilities.
Reference:
https://learn.microsoft.com/en-us/defender-cloud-apps/what-is-defender-for-cloud-apps