We currently support Google Analytics, Coremetrics and Adobe SiteCatalyst. We also support product-level redirects in your feed. You'll be prompted to confirm tracking parameters through the launch process. Polyvore can pass back the referring product landing page URL, associated bid category, and device type (desktop or mobile). We have first-party conversion tracking built into our platform via Polyvore’s conversion pixel that allows you to see transaction data in our reporting.