Shopify's default reports tell you traffic came from "Facebook" or "email." They don't tell you which ad, which flow, or which influencer post actually drove the sale. If you're spending real money across multiple channels, that gap is expensive. UTM tracking for Shopify stores fixes it, and it takes about twenty minutes to set up properly. Here's how it actually works, not just the theory.

Why Shopify Stores Need UTM Tracking