This feature is useful to segment leads / customers, for an example if you are doing an exhibition for 2 days and published your WhatsApp number to collect leads , you can create a new tag “New Leads” and map new subscribers into the “New Leads”, later you can send messages from broadcaster by selecting the subscribers in “New Leads” tag or can change the “New Leads” tag to “Potential” tag when your subscribers becomes a potential lead.