# Explicit and Implicit Feedback: A Complete Guide from 1-5 Stars to Click-Skip Behavior

> Source: https://sukruyusufkaya.com/en/learn/oneri-sistemleri/explicit-implicit-feedback-rating-click-skip
> Updated: 2026-05-13T13:29:33.622Z
> Category: Öneri Sistemleri
> Module: Module 1: Landscape of Recommender Systems & Problem Formulation
**TLDR:** Two fundamental data types in recommender systems: explicit (intentionally given stars/likes) vs implicit (click, dwell time, completion, skip). Differences, loss function impact, bias sources, hybrid usage, real-world labeling strategies.