Tags can be assigned to network devices or interfaces. You can use tags to filter flows in their search queries. Tags assigned to network devices or interfaces do not show up visually on the topology, however, they are helpful in filtering flows. The figure below shows the ability to visualize and filter flows based on tags. In this case, we have applied a filter site=HQ&tag=firewall which shows only the flows related to the device(s) tagged as firewall.