The G-57 is a chef's knife and like the standard Global chef's knives can perform most roles in kitchen. The G-57 is set apart from the other chef's knives by its deeper blade. So the knife is more predisposed towards chopping vegetables. If you just needed one knife for the kitchen, but that vast majority of what you are doing is cutting vegetables, we would recommend this blade. It is quite similar to a Santoku knife, in fact it's halfway between a classic chef's knife shape and a santoku. Having actually laid the G-46 Santoku knife next to this blade, the difference between the knives is minimal, the difference being the slight absence of a Santoku's lambs foot ending. So this knife could also be described as a 16cm Santoku knife.
Consider as an alternative to a G-2, or a vegetable chopper. The G-64 is also offered as the same blade with fluting.