Services

ROPO for Retail

Connect online website visits to offline in-store purchases — so digital marketing spend can be evaluated against total sales, not just e-commerce conversions.

When 85% of purchases happen in-store, standard digital analytics reports only a fraction of marketing impact. We connect raw website session data with CRM purchase records using a loyalty card ID as the common key — replacing disconnected reporting with a unified view that shows how digital channels drive offline sales.

Google AnalyticsGoogle Cloud PlatformGTM Server-SideBigQueryCRM / Loyalty Data

Proof point

MetricBeforeAfter

Purchase attributionBefore: 15% of sales visible (online only)After: 100% of offline sales matched to digital journeys

ROPO rate identifiedBefore: UnknownAfter: 25% of offline purchases preceded by site research

Campaign reportingBefore: Online conversions onlyAfter: Automated report tracking digital channels against offline sales

What it gives you

Marketing budget decisions based on total sales impact — not just online conversion rates that exclude 85% of revenue.

Retrospective identification of anonymous site visitors using past loyalty card purchases, so historical data is not lost.

Unsampled, raw session data streamed to GCP, so high-traffic sites (up to 1M daily visits) are measured without GA sampling distortion.

Automated reporting updated continuously — removing manual data extraction and reducing time-to-insight for campaign teams.

How it works

01GTM Server-Side is configured to stream unsampled session hits and user metadata directly to Google Cloud Platform, bypassing GA sampling limits.

02CRM and offline purchase data is batch-loaded to GCP; the loyalty card's unique customer ID is used as the primary key to join online and offline records.

03Logged-out site visitors are retrospectively matched to loyalty card holders using prior purchase history, extending attribution beyond active sessions.

04An automated report tracks digital marketing channel performance against offline purchase outcomes, refreshed without manual intervention.

What's included

GTM Server-Side setup and configuration

GCP data pipeline for session streaming

CRM batch data integration to GCP

Customer ID matching logic (online ↔ offline)

Retrospective visitor identification

Automated ROPO attribution report

Channel-level offline performance tracking

What you'll need

Google Analytics account (standard or 360)
Google Cloud Platform project access
CRM with unique customer ID per loyalty card
Offline transaction data exportable to GCP
Site login or loyalty card tied to user session

What we analyse

Online-to-offline attribution by channelROPO rate by product categorySession-to-store conversion lag timeLoyalty card match rate by segmentAssisted offline conversions per campaignAnonymous vs identified visitor behaviourDigital channel contribution to total revenueBudget allocation vs offline sales impact

Is this you?

Retailers with a loyalty or discount card programme where the majority of sales occur in physical stores, and where digital marketing ROI cannot be measured from online conversions alone.

For a major Eastern European retailer, Extremum Digital identified that 25% of all offline purchases were preceded by a website visit — evidence that directly informed budget reallocation across digital channels and improved overall marketing performance measurement.

Talk to us about this Read the ROPO case study