Most Google Ads accounts we inherited during our nine years running a marketing agency had the same problem: the business owner knew something was wrong, but couldn't pinpoint what. A proper ppc audit is the diagnostic that turns vague unease into a prioritised fix list.
A ppc audit works best when it goes beyond surface metrics — this article covers what to actually look for, which findings matter most, and how ongoing automated management prevents the same problems from returning.
What a PPC Audit Actually Reveals
A ppc audit is a structured review of a Google Ads account to identify waste, missed opportunity, and misalignment between campaign settings and business goals. It covers account structure, keyword targeting, bidding strategy, ad copy, landing page relevance, and budget allocation — typically in that order.
The output is not a report full of screenshots. It's a ranked list of actions, ordered by the likely impact on cost per conversion and return on ad spend. Everything else is noise.
Practitioners define it clearly: a ppc audit is a systematic examination of paid search activity designed to identify inefficiencies that are costing money or suppressing performance. That definition matters because it keeps the audit focused on outcomes rather than observations.
Most accounts we audited had three or four genuine problems buried under fifteen things that looked like problems but weren't. Learning to separate those is most of the skill.
How to Conduct a PPC Audit Step by Step
Start with campaign structure before touching any numbers. Campaigns and ad groups that are too broad make every other decision harder to interpret. If a single ad group contains forty keywords across three different intent levels, your quality score data is blended and your bid decisions are compromised from the start.
Once structure is assessed, move to search term reports. This is where most of the waste lives. Irrelevant queries triggering broad or phrase match keywords are often responsible for 20–40% of spend producing zero conversion value. Negative keyword lists are frequently sparse or not shared across campaigns.
Next, review bidding strategy against actual conversion data. Smart Bidding requires a minimum volume of conversions to function properly — Google's own guidance suggests at least 30–50 conversions per month at campaign level before Target CPA or Target ROAS becomes reliable. Below that threshold, manual or enhanced CPC often outperforms it.
After bidding, review ad copy and landing page alignment. Quality Score is a proxy for relevance. When the keyword, the ad, and the landing page don't share a coherent theme, Google charges more per click and shows the ad less. This is a fixable structural issue, not a creative one.
Finally, look at budget pacing and device performance. Budgets that exhaust by early afternoon suppress impression share during peak conversion windows. Device bid adjustments that haven't been reviewed since the account was set up frequently misallocate spend toward mobile sessions that rarely convert for B2B or high-consideration purchases.
For a deeper look at the cost side of this, AdWords cost: what SMEs actually pay in Google Ads breaks down where money typically goes and why.
What the Audit Findings Actually Mean
Not every finding in a ppc audit is worth acting on immediately. Prioritise by the combination of spend affected and expected impact on cost per conversion. A quality score of four on a keyword spending £8 per month is not a crisis. The same issue on a keyword spending £800 per month demands immediate attention.
Here's a practical framework for categorising audit findings:
| Finding | Priority | Typical Impact |
|---|---|---|
| Irrelevant search terms converting spend | High | Reduces wasted spend directly |
| Missing negative keywords | High | Prevents future waste |
| Smart Bidding with insufficient data | Medium-High | Improves bid accuracy |
| Low Quality Score on high-spend keywords | Medium-High | Reduces CPC, improves position |
| Budget exhausting before day ends | Medium | Recovers missed impression share |
| Poor mobile conversion rate, no bid adj. | Medium | Redirects budget to converting devices |
| Ad copy not tested in 6+ months | Low-Medium | Incremental CTR improvement |
| Campaign naming conventions | Low | Internal hygiene only |
The table above is based on what we consistently found mattered most when working through accounts — not what audit templates tend to emphasise. Naming conventions and campaign labels appear on every template. They rarely move the revenue needle.
Common Mistakes Found in Most Audits
Broad match without proper negative lists is the most common single source of wasted spend we encountered. It looks like scale. It is usually chaos. Broad match has a legitimate place in mature accounts with well-developed negative lists and strong conversion data — but in early or mid-stage accounts, it frequently burns budget on tangentially related queries.
Conversion tracking gaps are the second most common issue. We have audited accounts where the primary conversion action was firing on page load rather than form submission, meaning the account had been optimising toward phantom events for months. Smart Bidding trained on bad data produces bad results confidently.
The third is audience neglect. Remarketing lists, customer match, and in-market segments sit unused on most SME accounts despite being among the most cost-effective levers available. Bid adjustments toward high-intent audiences can meaningfully improve return on ad spend without increasing budget.
For specific help fixing one of the most common downstream effects of these issues, how to fix high cost per acquisition in Google Ads covers the recovery steps in detail.
PPC Audit vs Ongoing Management
A ppc audit is a point-in-time diagnosis. The problem is that Google Ads accounts are not static — auction dynamics shift, competitor activity changes, seasonality alters conversion rates, and Google's own algorithm updates affect how campaigns behave. An account that passes an audit in January can be underperforming significantly by March without anyone noticing.
This is the gap that ongoing active management is meant to fill. In practice, many SMEs either manage accounts themselves with limited time available, or pay an agency a monthly retainer that buys less active attention than they assume. What a Google PPC agency actually does for SMEs is worth reading if you're weighing that option.
The alternative that's gained significant ground in 2026 is AI-driven management that operates continuously rather than reactively. Rather than scheduling a quarterly audit and hoping the account holds up in between, the account is monitored and adjusted on an ongoing basis.
Overtime is an AI agent built specifically for this. It logs directly into Google Ads accounts, adjusts bids, pauses underperforming keywords and ads, reallocates budget across campaigns, and sends plain-English summaries of what it has done and why. It does not require a brief, a kickoff call, or a monthly reporting meeting.
When to Run a PPC Audit
There are four situations that make a ppc audit genuinely urgent rather than just good housekeeping.
First, when cost per conversion has increased by more than 20% over a 60-day period with no obvious external cause. Second, when an account has not had active management attention in more than 90 days — this is more common than it should be. Third, before increasing budget significantly, because scaling a broken account accelerates waste rather than growth. Fourth, when inheriting an account from a previous agency or in-house manager.
Outside of these situations, the discipline of treating the audit as a recurring process — rather than a one-off project — is what separates accounts that improve consistently from those that plateau.
For SMEs comparing their options before committing to an approach, AI-powered PPC management for small businesses covers the full decision landscape.
What a PPC Audit Won't Fix
This is the opinion you won't find in most audit guides: a ppc audit cannot fix a broken offer. If the product is priced uncompetitively, if the landing page does not answer the questions the visitor arrived with, or if the sales process fails to convert enquiries — no amount of campaign optimisation will produce a meaningful return.
We saw this repeatedly at the agency. Accounts that looked terrible technically would have underperformed even with perfect structure, because the commercial fundamentals were not in place. Audit the account, yes — but audit the conversion path and the offer first.
Similarly, an audit of a small account spending under £500 per month will surface relatively few actionable findings. The incremental gains from structural optimisation at that spend level are modest. The bigger lever at that scale is usually expanding the keyword set or improving the landing page, not restructuring campaigns.
See how to stop wasting budget on underperforming ads for a practical approach to the most immediate fixes regardless of account size.
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If you're planning a ppc audit and want the issues it surfaces to stay fixed rather than drift back over the following months, the logical next step is putting ongoing management in place. Review how Overtime's pricing works as a comparison point, then look at what automated bid management can and can't do before deciding on your approach. When you're ready, Overtime handles the ongoing management that a one-time audit cannot — adjusting bids, pausing waste, and reallocating budget continuously so the findings from your ppc audit don't simply reappear in the next one. For a full breakdown of how the account management works in practice, see the Google Ads management detail.
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FAQ
How long does a PPC audit take?
A thorough ppc audit of a small-to-medium Google Ads account typically takes between three and eight hours depending on account complexity, number of campaigns, and how well conversion tracking has been configured. Accounts with poor historical data or multiple tracking issues take longer because findings need to be validated carefully before action is recommended.
What does a PPC audit cost?
Freelance PPC consultants typically charge between £300 and £800 for a standalone audit. Agencies often include audits as part of a pitch process at no direct cost, though the audit scope in those cases is usually limited. For ongoing active management rather than a one-time review, freelance PPC specialist vs AI marketing automation compares the cost and capability trade-offs directly.
How often should I run a PPC audit?
For most SMEs, a structured ppc audit every six months is a reasonable baseline. Accounts with higher spend or more competitive auction environments benefit from quarterly reviews. If ongoing automated management is in place, the need for formal audits reduces because issues are identified and addressed continuously rather than accumulated between review cycles.
Should I do a PPC audit myself or hire someone?
If you understand account structure, Quality Score mechanics, and conversion tracking well enough to interpret what you find, a self-audit is viable for smaller accounts. The risk is misreading findings — particularly around Smart Bidding thresholds and attribution — and acting on things that look like problems but aren't. For accounts spending over £1,500 per month, external review is usually worth the cost.
Can AI replace a PPC audit?
AI cannot replace the strategic thinking that a good ppc audit requires, but it can replace the ongoing monitoring that prevents problems from accumulating in the first place. The practical value of an audit is identifying what's wrong and fixing it — an AI agent that monitors accounts continuously and acts on deteriorating performance addresses the same underlying need, but in real time rather than retrospectively.