Matrix voting is a type of voting system that allows people to rank their choices, or preferences, instead of just choosing one option. It's like a multiple choice test, but instead of picking just one answer, you can rank them in the order you like best. For example, in a matrix vote you could rank three different candidates in order of your preference. Instead of just picking one, you can say which one you like most, which one you like second best, and which one you like least. This way, everyone's opinion is taken into account.