Liam Mercer
Liam helps ecommerce businesses turn Google Ads spend into measurable growth by connecting campaign strategy, conversion tracking, analytics and the store experience behind every click.
Measurement before media spend.
Liam is part of YEEDOOR’s paid advertising practice, working with an internal nine-person advertising team focused on Google Ads strategy, campaign operations, conversion tracking, analytics and ecommerce performance.
His role is to connect media strategy with measurement: how the account is structured, whether conversions are recorded correctly, whether the store can support the traffic, and where budget should be increased, reduced or reallocated.
His work is supported by YEEDOOR’s broader cross-border ecommerce experience, built over 17 years across independent ecommerce websites, paid media, analytics and major ecommerce platforms. That 17-year operating background belongs to the broader YEEDOOR team; Liam’s public role remains centered on Google Ads and performance measurement.
Google Ads performance from account structure to verified conversion data.
Audit → Instrument → Structure → Optimize → Verify
The goal is not to increase spend before the measurement layer is trustworthy. Liam starts by validating the data, then structures campaigns around business economics and verifies whether optimization is producing real outcomes.
Read the account, funnel, store context and current performance before changing spend.
Verify GA4, GTM, pixels and conversion events so optimization is based on usable data.
Align campaigns, accounts, products, audiences and budgets with the business goal.
Improve bids, budgets, queries, creative, feeds and landing-page alignment using evidence.
Compare platform-reported results with analytics and ecommerce outcomes before scaling.
Google Ads & measurement work by Liam Mercer.
Liam’s author profile is the permanent home for his Google Ads, conversion tracking and performance-measurement writing. His published work is connected here as one specialist identity.
Google Ads Manager Account vs Client Account for Ecommerce
Why authorization through a manager account is different from selecting the client account that actually contains campaign data.
Read the guide →Conversion trackingShopify Conversion Tracking: Browser and Server-Side Events
A practical framework for diagnosing missing, duplicated or inconsistent conversion signals across Shopify and advertising platforms.
Read the guide →One identity across every channel.
Liam’s professional profiles and newsletter will be connected here as they go live, so his Google Ads, tracking and performance insights stay easy to follow.
Need a second opinion?
Share the ad account, tracking or ecommerce performance problem you are seeing. Liam and the YEEDOOR advertising team can help narrow the issue to campaign structure, measurement, store implementation or funnel performance.
Start with the Google Ads issue →Need a second opinion on your Google Ads?
Liam and the YEEDOOR advertising team analyze campaign structure, tracking, store performance and conversion data to identify what is limiting paid-media efficiency.