A feature is an input to a machine learning model. You can think of a model as a black-box function that takes features and outputs a prediction: prediction = model(features)

For example, If you're building a recommendation model at Spotify, you'll transform a stream of user listens into features like: user's top genre in last 30 days.

Featureform orchestrates the transformations on your infrastructure, manages the metadata like versioning, and allows you to serve them for training and inference.