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Recommendation systems are data processing technologies that analyze user behavior and preferences to recommend relevant products, services or content. They can be used in a variety of contexts, such as e-commerce, social media, music streaming, and movie recommendation. Recommender systems typically use collaborative filtering, content-based filtering, or hybrid recommendation algorithms to suggest things that may be of interest to users based on their purchase histories or browsing on a site or app.

Here is a more detailed podcast (in french) on the subject :