Answer:
An electoral college is a set of electors who are selected to elect a candidate to particular offices. They often choose a person for a particular office, such as president or prime minister. In the US, the electoral college has 538 electors. The larger the population in a state, the more electoral votes the state has. Of the current 538 electors, an absolute majority of 270 or more electoral votes is required to elect the president and vice president.
To win a state's electoral votes, you need a majority of votes in the state.
Example: State of California (55 electoral votes)
George Ige: 12,936,846
Bill Meag: 7,372,290
As you can see here, George Ige won the popular vote in the state, so he gets all 55 electoral votes.