When something needs to be cut, trimmed, sliced or chopped in the kitchen, the default tool is a knife.
But, a knife actually isn’t always the best option. It may make for slow-going of the task at hand, or not give the kind of precision or effect desired.
Cutters have evolved as kitchen tools to provide greater efficiency than knives may at times. Many cutters are designed for special purposes, which can be speed, decoration, or accuracy.
Some are designed for food preparation, others for food serving.
Some cutters you may use all the time, such as a pizza wheel cutter. Others, such as Christmas cookie cutters, you may only use once a year, but when you need them, there is really no substitute.