
Beyond ROAS: A Small-Brand Guide to Ad Incrementality Testing
Navigating the current digital landscape as a Shopify brand founder means ensuring every advertising dollar stretches further than ever. Customer acquisition costs have skyrocketed, climbing approximately 60% since 2020 (Causality Engine). Plus, Apple's privacy updates have obscured up to 75–85% of iOS activity, leaving advertisers grappling with diminished visibility (Causality Engine). As a result, your Facebook or Google dashboard might boast a stellar return on ad spend (ROAS), but the prett














