The Electoral College is a form of indirect voting where citizens vote for their electors and each elector, under the Twelfth Amendment is allowed to cast one vote each for president and vice-president. The statistical map above shows how many electors each of the American states has. What voters need to know about this system is that electors pledge to vote for a specific candidate, even though they are free to choose anyone eligible.
What a voter does is cast ballots for an elector who has pledged themselves to the two candidates favoured by the voter. The three-branched government of the USA is used to maintain balance of power; similarly, the Electoral College ensures that the Presidential election isn’t a pageant where his popularity would undermine the power of the other two branches. The popular vote comes into play when people vote for a party representative. (eg: The vote for Democrat representative between Hilary Clinton and Barack Obama.)