The Princeton Definition of Ranked Voting or IRV:
Instant runoff voting (IRV) is a voting system that elects one winner by ranked choice voting. Instant runoff voting is designed to more accurately represent voter choice than First-past-the-post voting. As a form of preferential voting, voters mark candidates in order of preference with the numbers 1, 2, 3, etc. IRV is considered mathematically superior to First-past-the-post in single-person elections as it eliminates vote splitting thereby reducing concerns about tactical voting and strategic nomination.
Ranked voting would increase voter turnout because people would no longer feel scared to support who they feel in their heart to be right. It completely eliminates the possibility of splitting the vote.