Runoff voting is intended to reduce the potential for eliminating "wasted" votes by tactical voting. Under the first past the post (plurality) method voters are encouraged to vote tactically by voting for only one of the two leading candidates, because a vote for any other candidate will not affect the result. Under runoff voting this tactic, known as "compromising", is sometimes unnecessary because, even if a voter's favourite candidate is eliminated in the first round, they will still have an opportunity to influence the result of the election by voting for a more popular candidate in the second round. However the tactic of compromising can still be used in runoff voting because it is sometimes necessary to compromise as a way of influencing which two candidates will survive to the second round. In order to do this it is necessary to vote for one of the "three" leading candidates in the first round, just as in an election held under the plurality method it is necessary to vote for one of the "two" leading candidates.