What a Google Ads Audit Actually Reveals About a London SME Campaign

A Google Ads audit of a typical London SME account reveals the same issues in the same order with remarkable consistency: broken or duplicated conversion tracking, broad match keywords without negative keyword lists consuming 30 to 45 percent of the budget on irrelevant searches, and campaigns that have never exited the learning phase because budget was too fragmented to accumulate sufficient conversion data. These are not edge cases. They are the baseline.

Most London SME Google Ads accounts underperform because they were set up by non-specialists or overloaded junior account managers, and Google's default settings push accounts toward configurations that generate clicks and spend rather than profitable conversions. Broad match keywords without negative lists routinely consume 30 to 45 percent of budget on irrelevant searches.

Most London SME Google Ads accounts were either set up by someone without specialist training or by a junior account manager at a large agency with too many accounts to manage carefully. Google's platform is designed to encourage spend. Default settings, recommended settings, and automated suggestions from the platform consistently push accounts toward configurations that generate more clicks and spend, not more profitable conversions. A Google Ads agency in London that audits accounts regularly sees the same structural problems in most campaigns they inherit.

The result is predictable. Broad match keywords match searches that have nothing to do with the business. Search and Display campaigns are combined, corrupting the data from both. Conversion tracking fires on page views instead of form completions, making the algorithm optimise for people who looked at the thank-you page URL rather than people who actually submitted a form. Smart Bidding, which depends on conversion data to function, optimises for nothing.

An audit checks conversion tracking accuracy, match type distribution, campaign structure, budget concentration, and Quality Score first, in that order of priority. In more than 70% of accounts audited, at least one conversion event is misconfigured, which corrupts every optimisation decision built on top of it.

Wasted spend in a Google Ads account is not abstract. It is money paid for clicks from searches that could never produce a conversion, or clicks that produced a conversion signal but not an actual lead or sale. In a London professional services account spending £3,000 per month, wasted spend of 35 percent means £1,050 per month is going to searches that will never produce business. At 45 percent, it is £1,350 per month.

The Search Terms report shows this with precision. Every week, this report reveals what actual user searches triggered your ads. A solicitor running ads for 'employment law advice' routinely sees their budget consumed by searches like 'employment law courses', 'employment law books', and 'employment law Wikipedia'. Each of those is a search from someone with no intent to hire a solicitor. Each one was paid for. A comprehensive negative keyword list added in week one typically reduces wasted spend by 20 to 35 percent before any other change is made.

Every audit recommends fixing conversion tracking first, then negative keywords, then campaign structure, then bidding strategy - in that fixed order. Reducing wasted spend through negative keywords alone typically produces a 20 to 40 percent improvement in cost per qualified lead before any structural change is made.

The priority order in every audit is: fix tracking first, then fix negatives, then fix structure, then fix bidding strategy. Changing bids before tracking is fixed means changing bids based on wrong data. Adding more budget before structural problems are resolved means spending more on the same inefficiencies. Tracking is always first. This applies equally to standalone paid advertising campaigns and to accounts running alongside an SEO programme.

A proper Google Ads audit for a London SME account typically costs a few hundred pounds if bought as a standalone service, and is often offered free by agencies pitching for ongoing management. For any account spending more than £1,000 per month, the audit pays for itself within the first month purely from the negative keyword fixes it surfaces.

The maths is straightforward. An account spending £2,000 per month with 35% wasted spend is losing £700 every month to searches that were never going to convert. An audit that costs a few hundred pounds and identifies £500-£700 of monthly savings has paid for itself before the first invoice is due, and the savings compound every month afterwards because the negative keyword list keeps working.

Some business owners assume an audit only makes sense for larger accounts. The opposite is usually true. Smaller accounts, those spending £500-£1,500 per month, are more likely to have been set up without specialist input and are more sensitive to wasted spend as a proportion of total budget, because there is no volume to absorb the inefficiency. A £150 wasted-spend problem on a £5,000 budget is a rounding error. The same £150 on a £600 budget is a quarter of the account.

A business owner with a few hours and access to Google Ads and Google Tag Manager can complete a basic self-audit covering conversion tracking and match types. A full structural audit, including Quality Score diagnosis, campaign architecture review, and a prioritised fix plan, benefits from specialist eyes because the patterns are only obvious once you have seen them across dozens of accounts.

The self-audit checklist is short: check that conversion actions fire on the right event, check the Search Terms report for irrelevant matches, and check whether Search and Display campaigns are combined. Any business owner can do this in an afternoon and will likely find at least one meaningful issue. What a self-audit typically misses is the interaction between problems: a Quality Score issue caused by ad relevance, made worse by a landing page mismatch, compounded by a bidding strategy that cannot function without clean conversion data. Untangling that interaction is where specialist experience earns its cost.

A thorough audit of a standard SME account, one to five campaigns across Search and Display or Shopping, takes three to five business days to complete properly. It covers tracking verification, campaign structure, keyword analysis, ad copy review, Quality Score assessment, and wasted spend quantification. We deliver the audit as a prioritised action plan, not just a list of issues.

Preserve the account in almost all cases. Account history, Quality Scores, and conversion data accumulated over time have value. Even a poorly structured account has historical data that informs better decisions if you know how to read it. Starting fresh loses that data and extends the learning phase for new campaigns. The exception is an account with a history of invalid clicks, manual penalties, or systematically corrupted conversion data where the history itself is the problem.

Wasted spend reduction alone typically produces a 20 to 40 percent improvement in cost per qualified lead without any additional budget. Structural improvements that fix campaign architecture and Quality Scores produce further gains over two to three months. The full improvement from a professional rebuild of a poorly structured account, measured over six months, regularly exceeds 50 percent reduction in cost per lead for accounts that were in poor shape. The absolute numbers depend on your sector, keyword competition, and landing page quality.

No. An audit is a diagnostic exercise conducted with read-only or view access to your account. Nothing is paused, changed, or restructured until you have seen the findings and agreed to a fix plan. Campaigns continue running exactly as they were throughout the audit period. The only exception is if the audit uncovers something urgent, such as a conversion event that has been broken for weeks, in which case we flag it immediately rather than waiting for the full report, but even then no change is made without your sign-off first.

Book a free Google Ads audit. We will show you your biggest wasted spend areas, your structural problems, and what a rebuilt account would deliver with the same budget.

An account audit is also a useful window into how a prospective agency actually works; see our guide on how to choose a marketing agency in the UK for the wider vetting checklist.