Data Strategy

Source of Truth

The authoritative data source for business metrics, typically your e-commerce platform (Shopify) rather than ad platforms.

Source of Truth is the definitive system for measuring business performance. For e-commerce: Shopify is source of truth for revenue, orders, and customer data. Ad platforms (Google, Meta) are NOT source of truth - they're measurement tools with biases (over-report their own performance). Why Shopify is source of truth: Records all orders regardless of source, no attribution bias, includes manual/phone orders, and captures full revenue (including shipping, taxes). Ad platforms: Only see conversions they can track, attribution models inflate performance, and miss offline conversions. Best practice: Use Shopify data for business decisions (actual revenue, actual ROAS), use ad platform data for optimization signals (which campaigns drive traffic), and reconcile regularly to identify attribution errors. Never trust platform-reported ROAS without validating against source of truth.

Related Terms

Frequently Asked Questions

What is a Source of Truth in marketing data?

A Source of Truth (SOT) is the single, authoritative data source for measuring business performance and key metrics. In e-commerce, this is typically the platform that records all transactions, such as Shopify or a dedicated ERP system, rather than individual advertising platforms like Google or Meta. The SOT provides the definitive, unbiased record of revenue, orders, and customer data, regardless of the marketing channel that drove the conversion. Relying on a single SOT is crucial for accurate financial reporting and making sound business decisions, as it eliminates the discrepancies and attribution biases inherent in platform-reported data.

How should marketers use the Source of Truth to reconcile ROAS discrepancies?

Marketers should use the Source of Truth (SOT) to perform regular ROAS reconciliation by comparing the revenue reported by ad platforms against the actual revenue recorded in the SOT, such as an e-commerce platform. The SOT data should be used for all critical business decisions, including budget allocation and forecasting. Ad platform data, which often over-reports performance due to view-through conversions and biased attribution models, should be used primarily for tactical optimization signals, such as identifying which campaigns are driving traffic. A best practice is to calculate a 'True ROAS' by dividing the ad platform's spend by the SOT's recorded revenue.

Why is an e-commerce platform considered the Source of Truth over ad platforms?

An e-commerce platform, like Shopify, is considered the Source of Truth because it records all orders and revenue without attribution bias, providing a complete and accurate financial picture. It captures every transaction, including manual or phone orders, and the full revenue amount, including shipping and taxes. Conversely, ad platforms are measurement tools with inherent biases; they only track conversions they can attribute to themselves, often using inflated attribution models that over-report their own performance. This makes the e-commerce platform the only reliable source for actual business performance metrics.

Want accurate attribution without the complexity?

Causality Engine automates attribution reconciliation and provides real-time insights for Shopify brands.

Join Waitlist →