There are two broad types of Recommender systems:
推荐系统分为两种:
Content-Based systems: These systems try to match users with items based on items’ content (genre, color, etc) and users’ profiles (likes, dislikes, demographic information, etc). For example, Youtube might suggest me cooking videos based on the fact that I’m a chef, and/or that I’ve watched a lot of baking videos in the past, hence utilizing the information it has about a video’s content and my profile.