This document discusses how quantitative analytics can help drive information architecture (IA) decisions. It provides examples of the types of metrics that can be measured, such as traffic to different sections of a website, and how these metrics can be used to understand user behavior and improve the user experience. Quantitative data is presented as complementing, not replacing, qualitative research methods. The document advocates starting analytics efforts by clearly defining business questions and goals in order to focus measurement efforts and ensure the collected data will provide actionable insights.