Abstract
From the background information supplied by the inventors, news correspondents obtained the followingquote: “This disclosure relates generally to users placing orders via an online concierge system, and moreparticularly machine learning methods for improving click through rates for search ads leveraging informationfrom search queries, users, and search ads.“In conventional collaborative filtering systems, the interests of a user are predicted by collectingpreference information from many users and finding users similar to the target user. Most such systemsuse a binary matrix, which captures whether a user has done a particular action, such as clicking on aprovided ad. Most conventional systems use a single signal, such as clicking on a provided ad, adding theitem to a shopping cart, or purchasing the item.”
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