Here's a quick guide:
 

Whole Bean Coffee:

Ideal for those who prefer to grind their coffee beans just before brewing.
Provides maximum freshness and flavour, as the coffee is ground right before use.
Suitable for various brewing methods, including espresso, drip coffee, French press, and more.

Pre-Ground Coffee with Specific Grind:

Convenient for those who want a ready-to-use coffee option without the need for a grinder.
 
Choose the grind size based on your preferred brewing method:

• Espresso (Domestic/Industrial): Fine grind for espresso machines.
  
• Espresso Stove Top (Moka Pot): Medium-fine grind for stovetop espresso makers.
  
• Filter: Medium grind for drip coffee makers.
  
• Plunger (French Press): Coarse grind for a longer steeping process.
  
• Turkish Grind: Very fine grind for traditional Turkish coffee preparation.
  

Consider your preferred brewing equipment and the flavour profile you enjoy. Whole bean coffee provides the flexibility to experiment with grind sizes, while pre-ground coffee offers convenience. Ultimately, it's a matter of personal preference and the brewing method you use.