What purpose does Daisy serve for Gatsby? How does she relate to his dreams?

Daisy is a large part of Gatsby's illusion of "making it". She remains the impetus for recreating himself and trying to erase the last five years like they never happened. Gatsby isn't so much in love with Daisy but rather the idea of Daisy.Daisy is actually a superficial socialite but Gatsby has built her up to be everything he wants in life. In the end, Gatsby is obsessed with a fantasy that cannot become reality.