How Foursquare Keeps Advancing Through the Use of Machine Learning

How does Foursquare use machine learning to make the product better? We all have access to more and more data, and using machine learning means we can make better decisions for our products based not on what we think is right, but what predictive models uncover about is right. Many parts of the Foursquare business rely on elements of machine learning, and our superpower, Pilgrim, which understands how people move through the world, was created almost entirely from a machine learning perspective. In our Foursquare City Guide app, we use machine learning in tip ranking. We spent some time manually extracting signals about tips, such as: What is the sentiment in the tip?