Approval voting is an incredibly simple and fair way to run elections. Voters are able to vote for multiple candidates in running for the same election, they can approve of as many candidates as they wish.
Election officials total up the votes, and the candidate with the most votes wins. This system can be used on the same voting machines we use now with the same ballots we use now, the only change would be that the ballot says “vote for all the candidates that you approve of” instead of “vote for one candidate”