What a Google Ads Audit Tool Can and Cannot Tell You

A Google Ads audit tool is software that reads your ad account and flags settings, spend and performance patterns against a fixed set of rules. That definition hides the useful part. The phrase covers three quite different products, each built to answer a different question, and each blind in a different place. Knowing which one you are looking at tells you how much weight to put on what it says.

I run Google Ads for ecommerce brands, and I use all three kinds. None of them replaces the others, and none of them replaces putting the ad account next to the store’s actual orders.

What does a Google Ads audit tool actually do?

A Google Ads audit tool compares what is in your account against a list of known problems and reports the matches. The list is the product. A good list catches campaigns that cannot serve, search terms spending without converting, missing negative keywords, disapproved ads, budgets running out by midday, and sudden changes in spend or conversions.

What the list cannot contain is anything the tool has no data for. Every audit tool sees the ad account. Almost none see your Shopify orders, your product margins, or what your customers would have bought anyway. That boundary decides what a tool can tell you, and it is the same boundary for every vendor.

The three kinds of tool, and the question each one answers

The three kinds are Google’s own built-in tools, one-shot graders, and always-on monitors. They overlap less than the shared name suggests.

The always-on category is the one most guides skip. Adalysis, which ranks near the top for this search, is not a one-off audit at all: its own page describes “100+ prebuilt checks” run continuously, with alerts for sudden spend increases and drops in conversions or revenue, sold after a 30-day trial. That is monitoring. It is valuable, and it answers a different question from a grader you run once.

Google’s built-ins are the most underused. Change history logs every edit to campaigns and ad groups and plots it against performance, going back two years. When an account falls off a cliff, the first question is what changed, and no third-party tool answers it as directly.

Is Google’s optimization score an audit?

No. Optimization score is Google’s estimate of how closely your account follows its recommendations, not a measure of whether the account makes you money. Google describes it as “an estimate of how well your Google Ads account is set to perform”, scored from 0% to 100% (Google Ads Help, about optimization score). The score rises when you accept recommendations and falls when you dismiss them.

• Some recommendations are genuinely good. Fixing a disapproved ad, adding missing assets, or removing a conflicting negative keyword are real wins, and the score is a fast way to find them.
• Some recommendations spend more money by design. Raising budgets, broadening match types and loosening targets all lift the score. Whether they lift your profit depends on a margin Google never sees.
• Auto-apply changes the account without you. Once “Automatically apply recommendations” is on, the selected types apply regularly (Google Ads Help, applying recommendations automatically). An account that drifted for months with nobody touching it often had this switched on.

Treat the score as a to-do list to review, not a grade to chase. Dismissing a recommendation that does not fit your business is a correct decision, and it lowers the number.

What can no tool tell you?

No tool can tell you whether your Google Ads conversions match the orders you actually received, because no audit tool has your order data. That single gap sits under everything else, since every bid the account places is steered by those conversions.

• Whether the conversions are real. A purchase tag firing twice, or a secondary action counted as a sale, makes every report look better than the business. A monitor will faithfully alert you when the inflated number drops.
• What you can afford to pay for a customer. A tool sees revenue. It does not see cost of goods, shipping or returns, so it cannot say whether a campaign returning three times its spend is profitable for you.
• How much of your result is branded search. People searching your store’s name were already coming. A tool can split brand from non-brand if you label it, but it cannot say how much of that brand revenue you would have kept for free.
• Whether Performance Max is taking credit for sales it did not create. Answering it means comparing periods and channels against store data over time.
• Why anything happened. A tool reports that conversions fell. Whether that was a site change, a stockout, a price rise or the season is a judgment call.

How do I know which one I need?

You need a one-shot grader if nobody has looked at the account in a long time, a monitor if a bad day would cost more than the subscription, and a person if the tools say everything is fine and sales still are not.

• Never had the account reviewed: run a free grader first. My notes on what a free Google Ads audit checks and what it cannot go through exactly which basics it will catch.
• Spending enough that a broken tag over a weekend hurts: an always-on monitor earns its fee by catching the break on day one instead of at month end.
• The tools show green and the numbers still feel wrong: that is the point where the problem is almost always in the measurement or the strategy, and that is where a manual audit starts.

How I use them together

I start with Change history and the conversion setup, not with a tool’s score. First I check which conversion actions are counted as primary and whether the purchase count agrees with the store. Then I read Change history for the months before the problem started. Only after that do I run automated checks, because their findings only mean something once the data underneath them is trusted.

From there the tools do what they do well: sweeping hundreds of search terms, flagging disapprovals and budget caps, watching for overnight changes. The judgment calls, such as whether branded spend is incremental or whether a target matches your margin, stay manual. The order I work through them is written up in my Google Ads account audit checklist.

Questions people ask