Abstract: A method is provided for building a user interest profile. According to the method, features of each of a plurality of articles are identified. For a given user, views of one or more of the plurality of articles are logged. For each view, a corresponding dwell time for the view by the given user is measured. A weight is applied to each view based on the corresponding measured dwell time. User interest scores for features of the articles are determined based on the weighted views, and the user interest profile is generated for the given user based on the user interest scores.

Abstract: Methods, systems and programming for targeting users with engaging content. In one example, a metric with respect to a piece of content is measured for each of a plurality of users. A first set of users is identified from the plurality of users based on the measured metrics and a threshold. User profiles of the first set of users are obtained. A second set of users is then identified based on the user profiles of the first set of users. The piece of content is provided to the second set of users.

Abstract: A method is provided for building a user interest profile, including the following method operations: identifying features of each of a plurality of articles; for a given user, logging views of one or more of the plurality of articles; for each view, measuring a corresponding dwell time for the view by the given user; applying a weight to each view based on the corresponding measured dwell time; determining user interest scores for features of the one or more of the plurality of articles based on the weighted views; generating a user interest profile for the given user based on the user interest scores.

Abstract: Method, system, and programs for measuring user engagement. In one example, a type of user activities with respect to a plurality pieces of content is detected. Information associated with the type of user activities is recorded. A time measure associated with at least one of the plurality pieces of content is obtained based on the recorded information. A user engagement score with respect to the at least one piece of content is calculated based on the time measure.