Your product model number is located on your appliance serial plate. How to read the numbers on your serial plate: 
(1) The model number, use this to search for user manuals or repair and service etc. 
(2) Product Number Code (PNC), use this when searching for spare parts for your appliance. 
(3) Serial Number, unique to your appliance.
                        Sample image of serial plate
This serial plate is located in different areas depending on the type of appliance.
Ovens
                                
Cooktops
                                
Rangehoods
                                
Microwave Ovens
                                
Drawers
                                
Dishwashers
                                
Washing Machines
                                
Dryers
                                
Washer Dryer Combo
                                
Fridges
                                
Freezers