# PrefEngine > Preference driven product discovery. PrefEngine is a preference engine for e-commerce. It asks shoppers what they want through quizzes, preference centers, and guided discovery, then turns those answers into tailored product matches and personalized journeys. Brands get zero party data they can use everywhere, and shoppers get a store that listens instead of guesses. PrefEngine is a standalone product. This site describes what the product does, how it works, how it compares to standard approaches, and answers common questions. ## Pages - [Home](https://prefengine.com/): product overview, comparison, and FAQ - [How does PrefEngine collect shopper preferences?](https://prefengine.com/#s0) - [What happens after a shopper shares their preferences?](https://prefengine.com/#s1) - [Why does zero party data matter more every year?](https://prefengine.com/#s2) - [FAQ](https://prefengine.com/#faq): common questions about PrefEngine and its category ## Contact - Free personalization audit: hello@prefengine.com