---
title: User session vector
slug: nbla0227
canonical_url: https://docs.coveo.com/en/nbla0227/
collection: glossary
source_format: adoc
---
# User session vector
A {doctitle} captures the products viewed by a specific customer during their [visit](https://docs.coveo.com/en/271/) to a Coveo-powered commerce site and is updated in real time to account for the customer's latest shopping preferences.
By incorporating this user session vector into the [product vector](https://docs.coveo.com/en/nbla0256/) space, [Coveo Personalization-as-you-go](https://docs.coveo.com/en/m5kd0347/) models can identify the products that align most with the customer's ongoing [session](https://docs.coveo.com/en/oa8g3582/).