What does a caterer helper do?

you supply food and drink Cater is a verb. You cater to another by bringing them what they need or attending to them.

A Caterer provides food and sometimes drink for a group, such as at a work meeting or wedding reception. The caterer might also provide other services such as providing wait staff and bartenders, dishes, glasses and silverware. Servers if the food is served in a line.

A good cater will meet with you and let you sample their food and pick out the china patterns you use.