What's in a date?

What’s the difference between use-by and best-before? Knowing how to read dates on our food can help us make smart food purchases. For example, if it has a ‘use-by’ date, maybe don’t buy in bulk!
References:
-REGULATION (EU) No 1169/2011 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 25 October 2011 on the provision of food information to consumers.