Complete Guide

The Complete PPC Audit Guide

Find wasted spend, fix broken tracking, and hold your agency to account. A step-by-step framework for auditing Google Ads, Microsoft Ads, and paid search.

In This Guide

What is a PPC Audit?Why Your Business Needs One Step-by-Step Process PPC Audit Checklist Platform-Specific Tips Common Issues Found PPC Audit vs Media Audit When to Hire Independent Help FAQs

What is a PPC Audit?

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 digital 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.

Why Your Business Needs a PPC Audit

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 to 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.

Identify wasted spend

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.

Fix poor keyword targeting

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.

Improve ad copy and extensions

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.

Fix weak landing pages

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.

Verify conversion tracking

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.

Correct bidding strategies

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.

How to Conduct a PPC Audit: Step-by-Step

A rigorous PPC audit follows a structured sequence: starting with the foundations (account structure and tracking), 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.

Account structure review

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.

Conversion tracking verification

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, which is a common issue that misleads the bidding algorithm.

Keyword analysis

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.

Ad copy review

Evaluate headlines, descriptions, and assets 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 asset coverage: sitelinks, callouts, structured snippets and call assets all affect Ad Rank and click-through rate.

Landing page relevance

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.

Quality Score analysis

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.

Bidding strategy assessment

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 CPC until volume is established.

Budget allocation review

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.

Audience targeting audit

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.

Attribution model check

Examine the attribution models in use across campaigns and in Google Analytics. Last-click attribution (still used in many older 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.

PPC Audit Checklist

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.

Campaign and ad group structure reviewed against best practice naming conventions

All conversion tracking tags verified and firing correctly with no duplicates

Search term reports reviewed for irrelevant queries and negative keyword gaps

Match type strategy assessed: broad match usage justified and monitored

Ad copy reviewed for relevance, asset coverage, and call-to-action clarity

Landing pages assessed for message match, load speed, and mobile optimisation

Quality Scores reviewed at keyword level; low scores investigated

Bidding strategies confirmed as appropriate for each campaign's objective and data volume

Budget allocation reviewed against commercial priorities and impression share data

Audience lists (remarketing, in-market, customer match) verified and applied correctly

Attribution model confirmed as appropriate: last-click vs. data-driven assessed

Geographic and device bid adjustments reviewed for efficiency

Ad scheduling reviewed against conversion data

Competitor activity benchmarked using auction insights reports

Agency account ownership and access permissions confirmed as client-controlled

Want a more comprehensive audit across all your media channels?

Platform-Specific Audit Tips

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.

Google Ads

Verify that the Google Ads account is owned by your business, not your agency. You should retain access and ownership if the agency relationship ends.
Check Performance Max campaigns carefully. PMax's black-box nature makes it easy for agencies to claim credit for conversions that would have occurred organically.
Review the Search Impression Share report to understand lost impression share due to budget versus rank, which reveals whether the problem is budget allocation or Quality Score.
Assess whether Smart Bidding strategies have sufficient conversion data to function effectively (Google recommends at least 30 to 50 conversions per month per campaign).

Microsoft Ads (Bing)

Check whether Microsoft Ads is being used at all; it is frequently overlooked despite typically offering lower CPCs and a valuable B2B audience demographic.
Review the import settings if campaigns have been imported from Google Ads; automatic imports can overwrite manual Microsoft Ads optimisations.
Assess LinkedIn Profile Targeting, which is unique to Microsoft Ads and valuable for B2B advertisers targeting by job function, industry, or company.
Verify Universal Event Tracking (UET) tag implementation and conversion goal configuration, which is often neglected compared to Google tag management.

Meta Ads (paid social)

Review Meta Pixel and Conversions API implementation; server-side tracking via the Conversions API significantly improves attribution accuracy following iOS privacy changes.
Assess Advantage+ sales campaigns and Advantage+ Audience targeting for transparency and control; these automation features can obscure where budget is actually going.
Check that the Meta ad account is owned by your business portfolio in Meta Business Suite, not the agency. Account ownership is a critical data protection and continuity issue.
Evaluate creative fatigue: review frequency metrics and ad rotation settings to ensure audiences are not seeing the same creative excessively.

LinkedIn Ads

Review Campaign Manager account ownership. LinkedIn Ads accounts should be owned by your business, with the agency granted manager-level access only.
Assess targeting parameters: job function, seniority, company size, and industry segments should be specific enough to reach your ideal customer profile without excessive audience overlap.
Review LinkedIn Insight Tag implementation and website retargeting audiences, which are often underutilised relative to the investment in acquisition campaigns.
Scrutinise CPL (cost per lead) and MQL quality; LinkedIn CPLs are typically higher than other channels, but the lead quality justification should be evidenced in CRM data.

Common Issues Found in PPC Audits

Across the paid search accounts we have audited, these are the issues we find most consistently; they tend to have the greatest impact on wasted spend and commercial performance.

Excessive broad match keyword usage

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 to 50% wasted spend on irrelevant keywords.

Missing or broken conversion tracking

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.

Poor landing page alignment

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.

Inappropriate bidding strategies

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.

Agency fees as a percentage of spend

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 distorting decisions

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.

Agency-owned ad accounts

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.

No negative keyword strategy

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.

PPC Audit vs Full Media Audit

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 to 4 weeks	4 to 12 weeks depending on scope
Investment	£3,000 to £20,000 depending on scope	£15,000 to £100,000+ depending on scope and spend

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.

When to Hire Independent Help

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.

Your PPC agency cannot provide direct ad account access or transparent cost breakdowns.

CPCs have risen or conversion rates have fallen significantly without a clear explanation from the agency.

You are approaching an agency contract renewal and want an independent assessment of value.

Your internal team lacks the expertise to critically evaluate agency recommendations and reporting.

You suspect broad match keywords, Performance Max, or other automated features are wasting budget.

Your agency charges a percentage of media spend, a structure that incentivises higher budgets, not better performance.

You have never had an independent third party review your paid search investment.

Fuel Media is an independent media auditing consultancy. We provide impartial PPC and paid search audits, with no agency relationships that could compromise our findings.

Frequently Asked Questions

How often should I audit my PPC campaigns?

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.

How long does a PPC audit take?

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.

What tools do I need for a PPC audit?

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.

How much does a professional PPC audit cost?

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.

Can ChatGPT audit my PPC campaigns?

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, unless they are connected to your accounts they cannot see live data, and they 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. This is why independent human auditors remain essential for high-value engagements.

What's the difference between a PPC audit and a media audit?

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.

Ready for an Independent PPC Audit?

Our independent media auditors will review your paid search accounts, identify wasted spend, and give you an honest assessment of your agency’s performance, with no agenda other than your best interests.