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In the video, Apache Spark is used to learn to rank articles. The data used in the algorithm is from daily web browsing logs. The first step is to remove any traffic generated through the collaborative filtering algorithm's own recommendations. The next step is to generate item-based collaborative filtering recommendations. The final step is to hold on to the collaborative filtering score and look at popularity of articles as determined by the number of people who have downloaded or viewed an article on ScienceDirect.
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