An engineer has many different WLANs on a WLC but does not want to broadcast...

In a Cisco Wireless LAN Controller (WLC), AP groups are used to manage the distribution of WLANs to different access points (APs). By configuring AP groups, an engineer can specify which WLANs are broadcasted by which APs. This allows for the creation of multiple WLANs across different APs without the need to create new interfaces for each WLAN. AP groups provide the flexibility to control WLAN availability based on location or other criteria, ensuring that only the intended WLANs are available through specific APs.