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PERFORMANCE MAX
Google recommends Performance Max to nearly every Australian advertiser, but the default settings hand the algorithm control it is not equipped to use without proper conversion signals, audience inputs, and brand exclusions. Shopify store owners across Sydney, Melbourne, Brisbane, and Perth are reporting ROAS numbers that look fine on paper and revenue growth that is not keeping pace.
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/ This is for you if
Shopify store owners who switched everything to PMax and watched ROAS drop
Australian e-commerce brands spending above AUD 5,000 per month on Google Ads
DTC brands running PMax without separating it from standard Search
/ What's broken
Google wants to know who your best customers are before it starts spending. Without a Shopify customer export uploaded as a customer match list, without high-value purchaser segments, or without structured visitor lists, PMax starts from scratch every time. In Australia, where customer acquisition costs are higher than most markets, this cold-start problem costs real money before the algorithm finds its feet.
PMax is actively bidding on your brand name in Google Search — "[your store name] Australia", "[your brand] free shipping", "[your brand] sale." These searches would convert through organic or direct traffic regardless. Instead, you are paying for clicks on searches from your own existing customers and turning them into PMax conversions that inflate your ROAS. The budget spent on these clicks is not generating growth.
A Shopify store selling skincare, supplements, and accessories from a single PMax asset group with three generic headlines and a product photo is asking Google to run relevant ads across six placements for three completely different purchase intentions. The algorithm degrades in this environment. Asset quality scores drop, impression share on high-value queries decreases, and YouTube and Display placements get filled with whatever Google can piece together from the available creative.
Smart Bidding needs purchase revenue values to run value-based bidding. If your Shopify tracking is passing through a fixed conversion value rather than actual order revenue, or if the same purchase is being counted in both Google Ads conversion tracking and a Google Analytics import, the algorithm is optimising against false data. In practice, this means Google shifts budget toward lower-value orders because it cannot distinguish them from higher-value ones.
/ What we engineer
Each workstream is built by the team that audits it, and wired into the rest of your growth system.
We review your Google Ads conversion actions, check for duplicate tracking between Google Ads and GA4 imports, and verify that your Shopify purchase events are passing dynamic revenue values. For stores using Shopify Payments or third-party checkout, we test the tracking end-to-end to confirm the data Google is receiving matches actual order values. This is the prerequisite for everything else.
We map your Shopify product catalogue and split PMax into asset groups by category, margin tier, or customer intent. Each group receives purpose-built headlines and descriptions written around the specific product and audience, unique imagery sourced from your existing creative library or provided as a brief, and where possible a short-form video. We document asset quality scores per group before and after the rebuild.
We export your Shopify customer data and upload it to Google Ads as a customer match list. We create separate segments for all purchasers and high-value purchasers (top 20% by order value) so PMax can use these as directional signals for new customer prospecting. We also configure website visitor lists segmented by product category pages and cart abandonment events.
We build a comprehensive brand exclusion list covering your brand name, common misspellings, domain variants, and product-specific branded terms. This is applied at the campaign level. We also review your standard Search campaign structure to ensure PMax and Search are not competing in the same branded auctions, and we document the budget split between the two so each campaign is accountable for a distinct part of the funnel.
We configure placement exclusion reports to identify and block low-quality Display and YouTube placements. We set up a weekly performance review cadence for the first two months covering ROAS by asset group, new-versus-returning customer attribution, and search term category analysis. We provide a monthly summary that separates branded from non-branded performance so you can see what the campaign is actually generating in new revenue.
/ What changes
/ Common questions
Straight answers on scope, timelines and cost. Anything else, ask us directly.
Ask us directlyYes, for most Australian e-commerce businesses with a product catalogue, running PMax and standard Shopping together — properly segmented — outperforms either campaign type alone. Standard Shopping gives you precise control over your highest-margin or highest-volume SKUs. PMax covers broader discovery across YouTube, Display, and Gmail. The critical requirement is that they are not competing for the same queries, which requires deliberate campaign prioritisation and negative keyword management between them.
A reported ROAS of 5× with flat revenue growth almost always indicates that a significant portion of conversions are coming from branded searches — people who already knew your store and would have converted through organic or direct traffic. The campaign is being credited for conversions it did not cause. A brand segmentation analysis typically resolves this picture within a week.
Customer match works for any Google Ads account in good standing with sufficient conversion history. For Australian stores, you export customer email addresses from Shopify, hash them according to Google's requirements, and upload them via the Audience Manager. Google matches these against signed-in Google accounts. A list of 1,000 to 5,000 past purchasers is typically sufficient to provide meaningful directional signal. Smaller lists still contribute to the audience signal input even if the match rate is modest.
You add a brand exclusion list within the PMax campaign settings — this is different from standard negative keywords, which PMax largely ignores. Google added brand exclusion controls for PMax in 2023. You build a list of your brand terms and domain, apply it at the campaign level, and monitor for any branded search terms still appearing in the search term transparency report. We handle this as part of the standard audit setup.
Budget allocation across placements is determined by Google's algorithm and is not directly controllable within PMax. In practice, most PMax campaigns in Australia weight toward Search and Shopping in the early weeks when conversion signal is strong, then expand into Display and YouTube as the algorithm seeks new audiences. Placement reports show you the actual split. If Display or YouTube placements are consuming significant budget without contributing proportional conversion value, that is a signal to review asset group quality and audience signal relevance.
Start here
The audit takes five days. We review your Shopify conversion setup, asset group structure, audience signals, and brand exclusion configuration against your actual account data — not a checklist. You receive a written report with prioritised, specific recommendations. No ongoing commitment is required to commission the audit.
5-day turnaround · PMax audit + signal review · No retainer requiredIgnited Nepal
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