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In this presentation, I plan to take a walk down memory lane by presenting some of the seminal and pioneering work in social and location recommendation based on the matrix factorization framework. I will outline novel ways to use social ensemble, trust relations, tags, click-through rate, etc. to improve social and location recommender systems for a wide range of applications and services. This talk will also elucidate some recent works that suggest potential future directions in social recommendations. </div> <div class="row lecture__section"> <h2>About this Lecture</h2> <span> <strong>Number of Slides: </strong> 60</span><br/> <span> <strong>Duration: </strong> 45 minutes </span><br/> <span> <strong>Languages Available: </strong> English</span><br/> <span> <strong>Last Updated: </strong> <span id="lecDate"></span> </span> </div> <div class="row lecture__section"> <h2>Request this Lecture</h2> <p>To request this particular lecture, please complete this <a href="https://services.acm.org/public/speakers/request_lecture.cfm?lecture_id=16011" target="_blank">online form.</a> </p> </div> <div class="row lecture__section"> <h2>Request a Tour</h2> <p>To request a tour with this speaker, please complete this <a href="https://services.acm.org/public/speakers/request_tour.cfm?lecturer_id=19708" target="_blank">online form.</a> </p> <p>All requests will be sent to ACM headquarters 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