Your Google Ads account can look busy while quietly destroying margin. Revenue may be rising, campaigns may be hitting a target ROAS, and your agency report may be full of positive graphs. None of that proves the account is profitable, scalable, or even being measured correctly.
A serious Google Ads audit review looks past surface-level platform metrics. For established eCommerce brands, the job is to identify where spend is being wasted, whether the data can be trusted, and what must change before increasing budget. It is not a box-ticking exercise. It is a commercial diagnosis.
What a Google Ads audit review should actually answer
The first question is not, “Are campaigns set up correctly?” It is, “Can this account acquire customers profitably at greater scale?” That requires context Google Ads cannot provide on its own: product margins, shipping and fulfilment costs, returns, repeat purchase behaviour, stock availability, and your actual break-even cost of sale.
A £5,000 campaign generating £25,000 in tracked revenue may appear healthy at a 5x ROAS. But if that revenue is concentrated in low-margin products, includes VAT, or is inflated by returning customers who would have bought anyway, the commercial picture changes quickly. A good audit separates apparent performance from useful performance.
It should leave you with clear answers to four things:
- Which campaigns, products and search terms are producing profitable incremental revenue.
- Where budget is leaking through poor targeting, weak feeds, irrelevant traffic or duplicate campaign activity.
- Whether conversion tracking and attribution are reliable enough to make budget decisions.
- What should be fixed first, what should be tested next, and what should simply be stopped.
That last point matters. More activity is not always progress. In many accounts, the fastest gain comes from removing wasted spend before adding new campaign types.
Start with the numbers that matter to the business
Before reviewing campaign settings, establish the commercial guardrails. An auditor should ask for your average order value, gross margin by product category, contribution margin after variable costs, target new-customer acquisition cost, and acceptable break-even point. If nobody asks, they are optimising towards a generic platform target rather than your business model.
ROAS is useful, but it is not the business objective. It can be a practical bidding metric where margin is consistent and the account has reliable revenue data. It becomes misleading when products have very different profitability, frequent discounts, high return rates, or bundles that obscure product-level economics.
For a fashion retailer, a 4x ROAS on a heavily returned sale category may be worse than a 3x ROAS on full-price accessories with strong repeat purchase rates. For a premium homeware brand, a lower immediate ROAS may be acceptable if the first order creates a valuable customer relationship. The right benchmark depends on your numbers, not an agency’s favourite dashboard metric.
Check tracking before believing performance
No optimisation can compensate for unreliable measurement. A Google Ads audit should inspect whether purchase conversion tracking fires once, records the right value and currency, and correctly excludes cancelled or duplicate orders where your setup allows it.
The review should also compare Google Ads data against your eCommerce platform and analytics reporting. The figures will not match perfectly because attribution models and reporting windows differ. That is normal. Large unexplained gaps, however, are a warning sign.
Common issues include transaction values being passed without shipping or discounts handled correctly, duplicated purchase tags, missing consent configuration, broken enhanced conversions, and campaigns bidding towards low-value actions such as page views or add-to-baskets. Each problem can push automated bidding in the wrong direction.
For brands running Performance Max, feed-only Shopping activity and search campaigns together, attribution deserves even more scrutiny. Google will take credit where it can. The audit needs to consider overlap, branded demand and the customer journey rather than treating every platform-reported sale as newly created revenue.
Review account structure for control, not complexity
There is no single perfect campaign structure. Anyone claiming otherwise is selling a template. The right structure depends on product range, data volume, margin variation, seasonality and how much control the brand needs over budget allocation.
That said, an audit should identify whether the current setup gives you meaningful levers. If best sellers, poor-margin products, clearance stock and new launches are all grouped into one automated campaign, you have limited ability to direct budget intelligently. Equally, splitting a small catalogue into dozens of underfunded campaigns can starve the system of data and create needless management overhead.
The question is whether the structure reflects commercial priorities. High-margin hero products may warrant dedicated control. Products with weak availability should not absorb aggressive spend. Seasonal ranges need a plan before demand peaks, not after stock has gone.
Search campaigns need the same discipline. Brand, non-brand, competitor and generic category intent should be understood separately. A brand campaign can produce impressive ROAS because users already know you. That does not make it a growth engine. It may still be worth protecting, but it should not mask weak prospecting performance.
Audit Shopping and Performance Max at feed level
For eCommerce advertisers, the product feed is often the biggest missed opportunity. Google cannot sell a product it cannot interpret properly. Poor titles, thin descriptions, incorrect categories, weak product types and missing attributes reduce the quality of the inventory you are giving the platform.
A useful review assesses whether titles reflect how people search, without turning them into unreadable keyword strings. It checks images, availability, pricing consistency, GTIN coverage, custom labels and Merchant Centre diagnostics. It also looks for products that spend but rarely convert, products that convert but are constrained by poor visibility, and feed attributes that prevent sensible segmentation.
Custom labels are particularly valuable when they mirror business reality. Margin tier, seasonality, bestseller status, stock level and promotional priority can help direct spend where it makes commercial sense. They are not magic fields. They are only valuable when the data behind them is accurate and maintained.
Performance Max requires restraint as well as expertise. It can scale efficiently when conversion data, feed quality and creative assets are strong. It can also spend aggressively with little transparency when the account is poorly structured. An audit should examine asset quality, audience signals, product grouping, final URL behaviour, brand traffic exposure and whether performance is corroborated by wider business data.
Find waste in search terms, placements and product spend
Waste is not always obvious from campaign-level averages. It hides in individual search queries, low-quality placements, product groups, locations, devices and time periods.
A thorough review looks for irrelevant queries, expensive informational traffic, competitor terms with no commercial return, products with persistent spend and no viable route to profitability, and geographic areas that consume budget without converting. Negative keyword strategy should be deliberate, especially for non-brand search. Blindly adding every low-converting query as a negative can restrict future discovery, but allowing clear irrelevance to run unchecked is just negligence.
The same judgement applies to exclusions. Too many exclusions can limit reach and learning. Too few leave the account exposed to predictable waste. The audit should explain the reason for every major recommendation, not simply hand over a longer exclusion list.
Turn findings into a profit-led action plan
An audit without priorities is just commentary. The final output should rank actions by likely commercial impact, confidence and effort.
Immediate fixes usually include tracking errors, obvious feed disapprovals, broken URLs, uncontrolled brand overlap, irrelevant search spend and products that cannot meet your break-even target. Next come structural changes, feed improvements, bidding tests and creative work. Larger experiments, such as customer acquisition segmentation or new-market expansion, should follow once the account has dependable data and a stable baseline.
Be wary of audits that recommend rebuilding everything. Sometimes an account needs a clean restructure. Often it needs selective correction, tighter measurement and disciplined budget reallocation. Rebuilding without a reason can reset learning and create disruption at the exact moment the business needs reliable trading.
At Oxedent, the standard is simple: an audit should make the next budget decision clearer. If it cannot show where profit is being protected, where growth is being constrained and what evidence supports the next move, it is not yet useful.
The right Google Ads audit review should leave you with more than a list of settings to change. It should give you a firmer grip on the relationship between ad spend, margin and growth – so every additional pound has a job to do.