ELI5: how recommendation algorithms work
// explanation
What is a recommendation algorithm?
A recommendation algorithm is like a smart friend who remembers what you like and suggests similar things you might enjoy [1][4]. When you watch videos or click on posts, the algorithm keeps track of your choices and uses that information to guess what you'll want to see next [2].
Why does it suggest things to you?
The algorithm works by looking at huge collections of data about what lots of people like [1]. It finds patterns—like "people who watched this video also watched that video"—and uses those patterns to predict what you personally might click on next [2][4].
How does it know what you'll like?
It's like the algorithm is playing detective with your choices [4]. It studies your past decisions and characteristics, then compares you to other people with similar tastes to make educated guesses about what content will keep you interested [4][2].
Why do you see what you see?
The algorithm calculates the probability that you'll engage with each piece of content, then shows you the things it thinks you're most likely to click on [2]. This is how YouTube knows to suggest videos and why your social media feed looks different from your friend's [1][5].
// sources
Huge data sets and matrices help online companies predict what you will click next.
Mar 9, 2023 ... Given a user and a post, the engagement prediction algorithm calculates a guess for how likely the user is to engage with the post if shown ...
Apr 21, 2024 ... How recommendation algorithms work in ML. Clear search. Ask. How recommendation algorithms work in ML. Top recommendation system models in ML.
Recommender systems are trained to understand the preferences, previous decisions, and characteristics of people and products using data gathered about their ...
Sep 21, 2022 ... This article aims to demystify recommender systems by walking through how they have evolved and how modern recommendation algorithms and models work.
Video by IBM Technology
Video by Explaining Tech Like You're Five
Video by Art of the Problem
