Your score is a measure of how much you agree with a party on the statements you have answered. A score of 100% means you and the party gave the same answer to every statement; 0% means you completely disagreed on every statement. Statements which you chose as very important count double; statements which you chose as less important count half as much.
Did your answer surprise you? Find out exactly where you agreed and disagreed with each party on the question match section of your results page.
For more info visit the methodology page on the Vote Match website.