# RelevanceRail > Product recommendations shoppers actually want. RelevanceRail is an AI product recommendation engine for e-commerce. It ranks your catalog for each shopper from their live behavior and purchase history, so recommendations reflect what that person is actually shopping for. The same engine powers product page suggestions, cart cross sells, category ordering, and post purchase offers. RelevanceRail 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://relevancerail.com/): product overview, comparison, and FAQ - [How does RelevanceRail rank products for each shopper?](https://relevancerail.com/#s0) - [Where do RelevanceRail recommendations appear?](https://relevancerail.com/#s1) - [How does RelevanceRail prove its recommendations work?](https://relevancerail.com/#s2) - [FAQ](https://relevancerail.com/#faq): common questions about RelevanceRail and its category ## Contact - Free personalization audit: hello@relevancerail.com