Avazu Click‐Through Rate Prediction Xiaocong Zhou and Peng Yan March 9, 2015 Problem description • Predict the click‐through rate of impressions on mobile device • Dataset – Raw features: • hour,click,C1,banner pos,site id,...,app id,...,device id,...,C14,...,C21 • Hour is in format "20141021", • The other known features are hashed as e.g."1fbe01fe". – Click(label) of day 21 to 30 is given, day 31