To add a tag to an SSID group
On the right of the SSID to which you want to add a tag, click on the (+) icon. The Add SSID window is displayed.
From the Basic section, select the AP Tags Availability list, and apply the tag(s) to the SSID.
After you add a tag on device, click the refresh button on the SSID Policies page to see those tags while editing the SSID.