CASBs were created with one thing in mind: protecting proprietary data stored in external, third-party media. CASBs deliver capabilities not generally available in traditional controls such as secure web gateways (SWGs) and enterprise firewalls. CASBs provide policy and governance concurrently across multiple cloud services and provide granular visibility into and control over user activities.
Visibility
Cloud apps unknown to IT result in information assets that are uncontrolled and outside the governance, risk, and compliance processes of the enterprise.