© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022
V. Raina, S. KrishnamurthyBuilding an Effective Data Science Practicehttps://doi.org/10.1007/978-1-4842-7419-4_9

9. Recommendations

Vineet Raina1   and Srinath Krishnamurthy1
(1)
Pune, India
 

Once upon a time, you may have had a close friend recommending a book, song, or movie to you – since the friend knew your “tastes,” you would typically check out their recommendations.

In the online world today, websites and mobile apps (and the companies that build them) have collected data about all their visitors and customers at a granular level of possibly each click that has happened on the website/app. This data includes every book/song/movie/product they have purchased/rejected ...

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