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A PPC audit is a systematic review of your paid search campaigns — typically Google Ads and Microsoft Ads (Bing) — to assess whether your budget is being spent efficiently, your tracking is accurate, and your agency is delivering the value it claims. Unlike a routine performance report, an audit takes a forensic view: it questions the account structure, validates the data, and examines every element that determines whether your paid search investment is generating real commercial returns.
PPC audits are relevant across the full spectrum of paid search activity. Whether you are running Google Search, Shopping, Performance Max, Display, or Demand Gen campaigns — or their equivalents in Microsoft Ads — an audit examines account architecture, keyword strategy, ad copy, landing pages, bidding, conversion tracking, and attribution. For businesses also running paid social (Meta, LinkedIn), those channels are often included in the scope of a broader paid media audit.
For B2B organisations and mid-to-large advertisers, a PPC audit is also a mechanism for agency accountability. When an agency controls the Google Ads account, the reporting, and the bidding strategy, it can be difficult for marketing leadership to know whether the investment is being managed in their best interests. An independent audit — especially one that includes commercial and contractual review — closes that information gap. This guide gives you the methodology to conduct one yourself or to brief an independent partner such as Fuel Media.
Paid search is one of the most measurable channels in digital marketing — yet it is also one of the most frequently mismanaged. Most accounts we audit have 30–50% wasted spend on irrelevant keywords, broken conversion tracking, or commercial arrangements that do not serve the client’s interests. Here are the six most compelling reasons to conduct a PPC audit.
Broad match keywords, missing negatives, irrelevant search terms, and poor campaign structure all drain budget without generating commercial returns. An audit quantifies the waste and identifies the fix.
Keyword strategies that made sense two years ago may now be out of step with how your customers search. An audit surfaces missing keywords, irrelevant match types, and cannibalisation between campaigns.
Weak headlines, missing extensions, and poor message match between ads and landing pages suppress click-through rates and Quality Scores, which in turn inflate your cost-per-click.
Sending paid traffic to generic pages, or pages with poor load speed and unclear calls to action, wastes the investment made to generate each click. Landing page quality is a core component of Quality Score.
Broken tracking tags, duplicate conversions, and misconfigured goals cause Smart Bidding algorithms to optimise towards the wrong outcomes. Accurate conversion data is the foundation of any paid search programme.
Smart Bidding strategies applied to campaigns with insufficient conversion data — or without a clear Target CPA or ROAS — waste budget as the algorithm explores without sufficient signal to guide it effectively.
A rigorous PPC audit follows a structured sequence — starting with the foundations (account structure and tracking) before moving to performance-level analysis (keywords, ads, landing pages) and finally strategic and commercial review (bidding, attribution, agency terms). Follow these ten steps in order for a complete picture.
Examine how campaigns and ad groups are organised. Poor structure — too few ad groups, mixed intent keywords, or inconsistent naming conventions — makes optimisation difficult and wastes budget. Each ad group should contain tightly themed keywords that align with a specific landing page.
Confirm that all conversion actions are correctly tagged and firing. Check for duplicate conversions, broken tags, or goals that are measuring micro-conversions (page views, button clicks) as primary conversions — a common issue that misleads the bidding algorithm.
Review match types across all campaigns — excessive broad match usage is a leading cause of wasted spend. Analyse search term reports to identify irrelevant queries triggering your ads. Assess the negative keyword list for gaps and conflicts with your positive keyword strategy.
Evaluate headlines, descriptions, and ad extensions for relevance, messaging consistency, and call-to-action clarity. Check ad strength scores and whether responsive search ads are using sufficient headline and description variations. Review extension coverage: sitelinks, callouts, structured snippets, and call extensions all contribute to Quality Score and click-through rate.
Assess whether landing pages match the intent and messaging of the ads pointing to them. Mismatched landing pages reduce Quality Score, increase cost-per-click, and lower conversion rates. Check page load speed, mobile optimisation, and whether each page has a clear, single call to action.
Review Quality Scores at the keyword level, paying particular attention to keywords scoring below seven. Low Quality Scores inflate CPCs and reduce ad visibility. The three components — expected CTR, ad relevance, and landing page experience — each indicate where improvements will have the greatest impact.
Evaluate whether the chosen bidding strategies (Target CPA, Target ROAS, Maximise Conversions, manual CPC) are appropriate for each campaign's objective and conversion volume. Smart bidding requires a minimum number of conversions per month to function effectively; campaigns with insufficient data should use manual or enhanced CPC until volume is established.
Analyse budget distribution across campaigns. Identify campaigns that regularly exceed budget (limiting impression share) and campaigns with surplus budget delivering poor returns. Assess whether the portfolio of campaigns reflects your commercial priorities or whether budget has drifted towards vanity metrics.
Review in-market, remarketing, and customer match audiences. Assess bid adjustments by audience segment, device, location, and time of day. Check for audience overlap between campaigns and verify that remarketing lists are populating correctly and being applied at the appropriate bid adjustment level.
Examine the attribution models in use across campaigns and in Google Analytics. Last-click attribution — still the default in many accounts — tends to over-credit bottom-funnel keywords and under-credit awareness-building activity. Data-driven attribution is the recommended model for accounts with sufficient conversion volume.
Use this 15-point checklist as a quick-reference framework when conducting your PPC audit. Each item corresponds to a meaningful area of account performance or governance.
Each paid search and paid social platform has specific structural quirks, automation features, and agency transparency risks that require tailored scrutiny. Here are the key audit considerations by platform.
After auditing hundreds of paid search accounts, these are the issues we find most consistently — and the ones that tend to have the greatest impact on wasted spend and commercial performance.
Over-reliance on broad match keywords triggers ads for irrelevant search queries, wasting significant budget on traffic that will never convert. Most accounts we audit have 30–50% wasted spend on irrelevant keywords.
Without reliable conversion data, Smart Bidding algorithms optimise towards the wrong outcomes. Duplicate conversion tags are equally problematic, inflating conversion counts and causing over-bidding.
Sending paid traffic to generic homepages or pages with mismatched messaging reduces Quality Scores, increases CPCs, and destroys conversion rates. Every ad group should have a dedicated landing page.
Using Smart Bidding strategies without sufficient conversion volume (typically under 30 conversions per month) causes erratic bidding behaviour and wasted spend. Manual CPC is often more appropriate in lower-volume accounts.
Agencies charging a percentage of media spend have a structural incentive to increase budgets regardless of performance. This misalignment of incentives is a common issue our contract reviews identify and address.
Last-click attribution over-credits the final keyword in the path and under-credits upper-funnel terms that initiated the journey. Budget decisions made on this basis systematically defund effective awareness activity.
Agencies that hold ownership of Google Ads accounts retain historical data, audience lists, and performance history if the relationship ends. Your business should always own its own ad accounts.
Accounts without a robust negative keyword list — or where the negative list has not been updated in months — bleed budget on irrelevant queries. Regular search term report analysis is non-negotiable.
A PPC audit and a full media audit serve different purposes and are appropriate in different situations. The table below outlines the key differences to help you determine which approach is right for your organisation.
| Dimension | PPC Audit | Full Media Audit |
|---|---|---|
| Scope | Paid search only (Google Ads, Microsoft Ads) | All paid media: search, social, display, programmatic, video, OOH |
| Depth on paid search | Very deep — keyword-level, bidding, Quality Score, attribution | Cross-channel view — paid search as % of total media mix |
| Agency contract review | PPC-specific terms only | All agency contracts, buying terms, rebates, and transparency |
| Best for | Businesses whose primary paid channel is search; optimisation focus | Multi-channel advertisers; agency accountability; strategic review |
| Typical duration | 2–4 weeks | 4–8 weeks |
| Investment | £3,000–£20,000 depending on scope | £15,000–£60,000+ depending on scope and channels |
Our recommendation: If paid search represents more than 40% of your total media budget, a dedicated PPC audit is a sensible starting point. If you have multiple agencies managing different channels, or if you have never had an independent commercial review of your media investment, a full media audit will uncover significantly more opportunity.
A self-conducted PPC audit is a valuable exercise, but there are situations where the complexity, the scale of investment, or the nature of the problem requires independent expert review. Here are the signals that indicate you should bring in an independent auditor.
For most businesses spending over £5,000 per month on PPC, a thorough audit should be conducted every six to twelve months. Monthly and quarterly performance reviews should also be in place to catch emerging issues. Beyond scheduled audits, specific trigger events warrant an immediate review: a significant increase in cost-per-click or cost-per-acquisition, a drop in conversion rates, a new agency appointment, an upcoming contract renewal, or concerns about where your budget is actually being spent.
A self-conducted PPC audit of a single Google Ads account typically takes one to two weeks of structured work. A professional audit covering Google Ads and Microsoft Ads, including agency contract review, attribution analysis, and competitive benchmarking, generally takes two to four weeks. The key variable is data access: agencies providing account access promptly and transparently can significantly accelerate the process.
The primary tools are the native platforms themselves — Google Ads, Microsoft Advertising, and Google Analytics 4 (or your web analytics platform). For keyword and competitive research, tools such as SEMrush, Ahrefs, or SpyFu provide useful context. For landing page analysis, you may also draw on heatmap tools such as Hotjar or Microsoft Clarity. An independent auditor will typically also review contracts, invoices, and rate cards alongside platform data.
Professional PPC audit fees vary based on scope. A focused audit of a single Google Ads account — reviewing structure, keywords, bidding, and tracking — typically ranges from three thousand to eight thousand pounds. A comprehensive audit covering Google Ads and Microsoft Ads, with agency contract review, attribution modelling, and competitor benchmarking, generally falls between eight thousand and twenty thousand pounds. These costs should be weighed against the savings potential: clients who discover significant wasted spend or unfavourable agency terms typically recover the audit fee many times over within the first year.
AI tools including ChatGPT can assist with elements of a PPC audit — for example, reviewing ad copy against best practices, analysing keyword lists for relevance, or summarising performance reports. However, they cannot access your live ad account data, cannot benchmark your costs against your specific industry and competitors, and cannot review the commercial terms of your agency contract. A rigorous PPC audit requires direct access to account data, independent analytical judgement, and experience of what good looks like across comparable accounts — which is why independent human auditors remain essential for high-value engagements.
A PPC audit focuses specifically on paid search activity — Google Ads, Microsoft Ads, and related paid search platforms. It examines account structure, keyword strategy, bidding, ad copy, landing pages, and conversion tracking. A full media audit is broader in scope: it covers all paid media channels including display, programmatic, social, video, and out-of-home, and typically also includes agency contract review, buying terms, transparency, and commercial arrangements. A PPC audit is often a starting point or a component of a larger media audit, particularly for businesses where paid search represents a significant share of the total media budget.
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