[TBD]Understanding recommender system in machine learning

Introduction

Laymen explanation

The purpose of a recommender system is to suggest relevant items to users. If you like to know more about the science behind it, this document helps.

Technical explanation

A Recommender System refers to a system that is capable of predicting the future preference of a set of items for a user, and recommend the top items. One key reason why we need a recommender system in modern society is that people have too much options due to the prevalence of Internet.

Approaches

Content based recommendations

It groups based on content similarity

Collaborative filtering

It groups based on users similarity