Checkbox
A square box you click to turn an option on or off.
A checkbox is a small square that holds a tick when on and stays empty when off. Each checkbox is independent — checking one does not affect the others. They are how you select multiple things at once.
Use a checkbox when there is one option to confirm (like agreeing to terms) or several options where any number can be selected. If users must pick exactly one of a list, use radio buttons instead.