Yesterday Michigan Electors gathered at the Capitol of Michigan and voted for the President of the United States. What is an Elector? There seems to be quite a bit of information about that, the History site has a pretty good piece about the position.
In a nutshell, they are supposed to vote for President and Vice-President of the United States. As the History site stated:
“On Election Day, when Americans vote for the presidential and vice presidential candidates of a political party, they are actually voting for the slate of electors who have pledged to cast their votes for that party. Electors’ names may or may not appear on the ballot beneath the names of the candidates, depending on the election rules and the format of the ballots in each state.”