What is ranked choice voting?

Lots of people are talking about it. A political-science cottage industry now debates its effects on participation. Ranked-choice voting is variously associated with lower voter turnout, higher voter turnout, higher invalid ballot rates, more female candidates, more racial and ethnic minority candidates, more women in office, and more racial and ethnic minority women in office — “more” than in some comparison setting. But what is ranked choice voting?

Short answer: A type of ballot on which alternatives are ranked. Period.