Google Partner · Shopify Partner · Real ROAS proof, not promises
£298K
Advertising spend
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WTDiesel transformed its Google Ads ecosystem with a structured, data-driven approach covering campaign architecture, Merchant Center optimization, Performance Max, Shopping, Search, remarketing, and advanced conversion tracking.
WTDiesel
visit websiteWTDiesel is one of the UK's leading suppliers of remanufactured diesel injectors, fuel system components, turbochargers, and diesel engine replacement parts for brands including Bosch, Delphi, Denso, and Siemens.
£5.23M
tracked conversion value
£298K
advertising investment
17,000+
total conversions
Campaign period: Q1 2023 – Q3 2026
Automotive Parts / Diesel Fuel Injectors
Remanufactured diesel injectors, fuel system components, turbochargers and diesel engine replacement parts
Shopify
Primary ecommerce platform
United Kingdom, Europe & International
Primary advertising and customer acquisition markets
Google Ads
Primary customer acquisition and performance marketing channel
Business objectives
The engagement focused on profitable growth, stronger acquisition, better Shopping performance, improved feed quality, stronger tracking and a scalable long-term advertising framework.
01
Increase online revenue through a stronger Google Ads acquisition system.
02
Scale campaigns without sacrificing profitability or advertising efficiency.
03
Improve Google Shopping performance and increase visibility for thousands of SKUs.
04
Capture more high-intent buyers through dedicated Search, Shopping and Performance Max campaigns.
05
Reduce wasted ad spend and improve product feed quality across the account.
06
Increase returning customer purchases through full-funnel remarketing and segmentation.
07
Build a scalable campaign structure capable of long-term profitable growth.
The account was transformed from a broad and inefficient advertising setup into a structured, data-driven Google Ads system.
| Area | Before | After |
|---|---|---|
| Campaign Structure | Broad and difficult to scale | Segmented by product category, campaign objective, and profitability |
| Google Shopping | Basic product feed | Fully optimized feed with keyword-rich titles and structured attributes |
| Merchant Center | Limited optimization | Advanced feed management, diagnostics, and product prioritization |
| Performance Max | Generic setup | Audience-led asset groups with continuous optimization |
| Search Campaigns | Limited keyword coverage | Expanded high-intent search campaigns targeting buyer intent |
| Budget Allocation | Evenly distributed | Budget shifted toward highest-ROAS campaigns and products |
| Conversion Tracking | Standard purchase tracking | Enhanced Conversions, GA4 integration, and improved attribution |
| Remarketing | Minimal | Full-funnel dynamic remarketing and customer segmentation |
| Account Scalability | Limited | Built for profitable long-term scaling |
Google Ads transformation · WTDiesel · Q1 2023 – Q3 2026
Before optimization, campaigns had broad organization, overlapping products, limited segmentation between product categories, inefficient budget distribution and heavy dependence on a small number of campaigns. After optimization, campaigns were fully segmented by product category, campaign objective and profitability, including Performance Max, Standard Shopping, Brand Search, Non-Brand Search, Dynamic Search Ads, Remarketing, Seasonal and Promotional campaigns.
The account started with generic product titles, inconsistent product attributes, limited keyword optimization, missing custom labels and poor product prioritization. The optimized setup introduced SEO-focused product titles, keyword-rich descriptions, product type restructuring, GTIN validation, brand consistency, custom labels, sale price optimization and image quality improvements.
Shopping campaigns suffered from limited impression share, incomplete product coverage, underperforming product groups and low visibility for high-margin products. They were rebuilt with product segmentation by profitability, best-seller prioritization, product exclusions, search query optimization, device optimization, geographic bid adjustments and continuous feed refinement.
Generic Performance Max campaigns with weak audience signals, limited creative testing and shared budgets were replaced with audience-led asset groups, refined audience signals, creative testing, search term insight analysis, Customer Match audiences, budget optimization and product grouping based on historical performance.
Limited keyword coverage was expanded into dedicated high-intent Search campaigns targeting Bosch injectors, Delphi injectors, Denso injectors, Siemens injectors, diesel fuel injectors, vehicle-specific injector searches and brand-specific replacement parts. This increased qualified traffic while reducing wasted spend.
Minimal audience targeting was expanded into a full-funnel remarketing system including dynamic product remarketing, cart abandonment campaigns, product view remarketing, previous customer campaigns, cross-sell campaigns and high-value customer audiences to improve repeat purchase rates and overall ROAS.
Standard purchase tracking was upgraded with Google Ads purchase tracking, GA4 integration, Enhanced Conversions, revenue tracking, customer journey analysis and first-party audience collection, enabling Google's Smart Bidding to optimize more effectively.
The account was actively managed every week through search term analysis, negative keyword expansion, bid strategy adjustments, budget reallocation, feed optimization, Merchant Center diagnostics, audience analysis, device optimization, geographic performance reviews, landing page analysis, asset testing and seasonal promotion planning.
The transformation of WTDiesel's Google Ads account created a scalable acquisition engine capable of delivering sustained growth. By aligning campaign structure, product data, audience targeting, and measurement, the business significantly increased online visibility, captured more purchase-ready customers, and improved advertising efficiency. Over the reporting period, Google Ads delivered £5.23 million in tracked conversion value from £298,000 in advertising spend, resulting in 17,000+ conversions and an outstanding 17.52x Return on Ad Spend. This case demonstrates how a structured, data-driven Google Ads strategy can generate long-term, profitable growth for a competitive automotive eCommerce brand.
£0.00M
Tracked Conversion Value
Revenue value tracked through Google Ads
0,000+
Conversions Generated
Total conversions generated
0.00x
Return on Ad Spend
Return generated from advertising spend
£0K
Advertising Spend
Total Google Ads advertising spend
