Why content based filtering not supervised learning?

Course Q&A Machine Learning Specialization Unsupervised Learning, Recommenders, Reinforcement
1

Why content based filtering is not supervised learning, as we are predicting on the basis of that user pervious ratings ?

2

Hello @Saurabh_Patel1

In content based filtering, we are indeed using supervised learning technique with the user rating for a particular movie being the target variable.