Published: 14th August 2026
A high ACoS is rarely the real problem. It is the visible symptom of a campaign account that is targeting the wrong demand, paying too much for low-value clicks, or sending traffic to product pages that cannot convert. Knowing how to audit Amazon campaigns properly means finding the commercial cause, not just pausing a few expensive keywords.
For a growing brand, an Amazon advertising audit should answer a harder question: is paid media creating profitable, scalable demand, or merely inflating revenue while eroding margin? That requires more than looking at a 30-day ROAS figure. It requires a structured review of account economics, campaign architecture, search-term performance, retail readiness and budget allocation.
Before reviewing a single campaign, set the financial guardrails. ACoS and ROAS are useful operating metrics, but neither tells you whether an order is commercially worthwhile. Your target depends on contribution margin after Amazon fees, cost of goods, fulfilment, promotions, returns and VAT considerations.
Work out the break-even ACoS for each product or product family. Then define a target ACoS that leaves room for profit, alongside a higher strategic threshold for launches, ranking pushes or defending a priority term. Treating every SKU to the same ACoS target is a common mistake. A high-margin replenishable product can sustain a different acquisition cost from a low-margin seasonal item.
Also separate total advertising cost of sales from campaign-level ACoS. Campaign data can look efficient while total ad spend rises faster than organic sales. If your total ACoS is worsening, paid activity may be cannibalising orders you would have won organically, or it may be supporting products with weak retail fundamentals.
Start with a 60- to 90-day view, then compare the latest 30 days with the previous period. Short windows are useful for spotting a sudden shift, but they can produce bad decisions when stock issues, promotions or seasonal demand distort performance.
Review the account in this order: commercial performance, budget allocation, campaign structure, targeting quality, conversion rate and product-page readiness. That sequence matters. There is little value in refining bids if the product is out of stock, poorly priced or losing the Buy Box.
Pull spend, sales, orders, ACoS, ROAS, CPC, click-through rate and conversion rate by campaign type, campaign, ad group, advertised ASIN and targeting expression. The aim is to see concentration quickly.
Ask whether spend is concentrated on the products that matter most to the business. Many accounts drift towards the easiest products to advertise rather than the products with the strongest margin, stock position or strategic value. A bestseller may absorb most of the budget because it converts, while a profitable growth line receives too little data to improve.
Look for three patterns. First, campaigns spending meaningfully with no sales or a clearly unacceptable ACoS. Second, campaigns constrained by budget despite profitable conversion. Third, high-revenue campaigns with deteriorating efficiency. The last category often deserves more attention than obvious waste because it can quietly consume the budget that should be funding growth.
Do not make decisions from spend alone. A search term with no orders after a handful of clicks is not proven waste. A term with sustained spend, weak conversion and no credible path to profitability is.
A good account structure separates discovery from exploitation. Auto campaigns, broad match and product targeting can find new demand. Exact match, controlled phrase match and proven ASIN targets should capture it with clear bids, budgets and reporting.
When everything sits in one mixed campaign, performance becomes difficult to interpret. A profitable exact keyword can mask broad-match waste. A strong branded term can make a generic category campaign look healthier than it is. You lose the ability to decide where budget should go.
Audit whether campaigns have a distinct job. Sponsored Products should normally provide the foundation for high-intent search coverage and product targeting. Sponsored Brands should have a defined role, whether that is brand defence, category visibility or Store traffic. Sponsored Display should be assessed on its ability to influence relevant audiences and ASINs, not judged by the same immediate-return standard in every case.
There is no universal campaign template. A small catalogue needs simpler management than a brand with hundreds of ASINs. But every campaign should have a named purpose, a logical targeting group and a budget that matches its role.
The search-term report is where vague optimisation becomes accountable decision-making. Review customer queries rather than relying only on the keyword list. Identify terms that generate profitable orders, terms that have spent beyond your tolerance without converting, and queries that reveal weak relevance.
Move proven terms into dedicated exact-match campaigns where you can protect budget and bid deliberately. Add negative exact or negative phrase targets where the data shows persistent waste. The choice depends on the problem: negative exact blocks one poor query, while negative phrase prevents a broader set of irrelevant variations.
Be careful not to over-negative. Amazon search behaviour is messy, and a query that looks broad may still be commercially relevant. If the issue is low conversion across a valuable generic term, the fix may be pricing, reviews, imagery or a more appropriate product rather than exclusion.
Rising bids are often the fastest way to spend more and the slowest way to solve a weak product proposition. Compare campaign conversion rates against the product’s wider conversion performance and relevant category expectations. If clicks are coming in but orders are not, investigate the retail page before expanding traffic.
Check the practical blockers: Buy Box eligibility, stock cover, delivery promise, price position, coupon activity, review quality, main image, variation structure and title relevance. If the advertised ASIN is unavailable or commercially uncompetitive, advertising optimisation cannot rescue it.
This is especially important for brands using broad or competitor targeting. These campaigns can generate affordable clicks, but the customer will compare your product against alternatives in seconds. The listing must make the value case immediately.
An audit should end with a budget decision, not a spreadsheet full of observations. Protect profitable campaigns that are budget-limited. Reduce or pause spend where performance is proven weak. Ring-fence controlled testing budgets for new keywords, ASIN targets and product launches so experimentation does not dilute established revenue.
Pacing matters as much as the monthly budget. If priority campaigns exhaust their daily allowance by early afternoon while low-value activity keeps running, the account is not being managed for demand capture. Review intraday pacing where available, but do not overreact to one day of data. Use weekly decisions supported by sufficient conversion volume.
A useful operating split is core revenue capture, growth opportunities, brand defence and controlled tests. The percentages will vary by category and maturity, but the principle holds: every pound should have a job.
The strongest audit is not a one-off diagnosis. It becomes a prioritised action plan with clear ownership. Separate immediate fixes, such as negatives, bid changes and budget reallocation, from structural work such as campaign rebuilds, listing upgrades and margin reviews.
Set a short list of commercial KPIs: profitable ad sales, ACoS against product-level targets, total ACoS, conversion rate, budget lost to constraints and the share of spend on strategic ASINs. Avoid reporting twenty metrics if none of them lead to a decision.
For brands that need senior direction without adding full-time headcount, Accendo360 approaches audits as the start of account ownership, not a static report. The objective is a cleaner decision system: better campaign control, stronger retail readiness and paid growth that protects margin.
Your next optimisation meeting should not begin with, “Which bids should we change?” Begin with, “Where can the next pound of spend produce profitable growth?” That question keeps Amazon advertising tied to the commercial outcome that matters.