Air carrier operations supervisor reported being notified to inform ramp personnel to ensure enough bag/mail/ballast securement was applied for safe transport.

Narrative

While acting as supervisor on duty I contacted the bag room via radio to verify if we received a DG (Dangerous Good) UN3373 package that was listed on the DSTG (Departure Staging Guide) with applicable DG/HAZMAT warning. I received a reply advising that the shipment was present and would be loaded as planned. After receiving the reply I immediately received a phone call from my Supervisor advising me not to refer to UN3373 as DG because; 'it can cause confusion since we do not accept DG and requires special pilot notification'. I was unsure how to reply to that statement due to it coming from someone in a position of authority and effectively just said ok and allowed the call to end. I had just participated in multiple rounds of recurrent training that directly contradicts the request from my Supervisor. I understand that UN3373 must be treated as DG including the applicable bag/mail/ballast securement. I was unsure how to express my concern regarding this request and felt that it would be worthy of a report. The core reason I wanted to verify if the shipment had been tendered was to ensure the ramp knew in advance due to a staffing change from the delay and to ensure enough bags were checked to properly secure it since PAX (passenger) counts were liable to change.