Machine Learning: If It's Testable It's Teachable LambdaTest

Ever wondered how you went to YouTube to watch just a 5 minutes video but ended up there for 3 hours? Or saw an advertisement on some page of exactly the same thing that you have been planning to buy for last 15 days and ended up finally buying it! Isn't it great how your computer knows what you have been desiring? Well, it's not your computer but the bots, the algorithmic bots that have been watching you all the time. So the question comes, how these bots are made, and how software testing concepts come into play here.