Olives are very bitter and can’t be eaten right off the tree, they must be cured to reduce their bitterness. Processing methods differ with the olive variety, and region. There are various types of olives, some are picked unripe, others can fully ripen on the tree. The colour of an olive is not directly related to its state of ripeness. A type of olives start off green and turn black when fully ripe. A different type start off green and remain green when fully mature, while others start of black and remain black.
In Greece and Cyprus they are typically eaten by themselves as a snack accompanied with crusty bread or as drinks snack.