Hand dominance (or handedness) is the preference of one hand over another. Once a child establishes a hand dominance, they will often be labelled as either right-handed or left-handed. In some occasions, the individual might be labelled as ambidextrous or mixed-handed.
Developing a hand dominance is important as it allows the individual to develop more skilled movements using that hand. For example, this is needed when writing or using cutlery.