The advent of online streaming services has revolutionized the entertainment consumption, in more ways than one. The availability of thousands of hours of entertainment, however, came with caveats, as it created an overwhelming experience for the user to navigate through and discover the most relevant content. Thus, the significant shift from analog to digital has made the presence of recommender algorithms an urgent aspect for the modern media landscape. Online entertainment platforms were forced to adopt automated mechanisms to offer customized curation to users, in the most efficient manner. From online TV and movie providers such as Netflix and Amazon Prime to video sharing services such as YouTube, to online music services on world-leading platforms such as Spotify and Apple Music, the use of recommender tools has become an industry standard.