Multiwinner voting is a way to make decisions. It's like an election, but instead of picking one winner, you can pick more than one. For example, if you had a vote with five people running, instead of picking just one to win, you could pick two, three, four, or even all five. It's a way for more than one person to win, which can be helpful if you want to make sure everyone gets a chance to have their ideas heard or chosen.