Web usage controls are a feature of Cisco Web Security Appliance (WSA) that allow administrators to define and enforce policies for web access based on URL categories. URL categories are groups of websites that share a common theme or content, such as news, sports, entertainment, etc. Cisco WSA uses the Cisco Dynamic Content Analysis Engine and the Talos Security Intelligence and Research Group to provide accurate and up-to-date URL categorization. Administrators can use the web usage controls to allow, block, warn, or monitor web requests based on the URL category of the destination website. They can also create custom URL categories to include or exclude specific domains or URLs from the predefined categories. Web usage controls help administrators to control web traffic, enhance security, improve productivity, and comply with regulatory and organizational requirements. References :=
Some possible references are:
Web Usage Controls - Cisco Web Security Appliance User Guide, Cisco
Cisco Web Usage Control Filtering Categories Data Sheet, Cisco
Define Custom URL Categories in WSA, Cisco
