Somewhere in your ad account right now, money is being wasted. Not in a dramatic, obvious way. In a slow, quiet way that doesn’t trigger alarms because the overall numbers look acceptable and nobody has dug deep enough to find the problems hiding beneath the averages.
That’s what a PPC audit is for. Not a surface-level glance at the dashboard, but a systematic review of every layer in your campaigns to find where spend is leaking, where performance is being masked by aggregation, and where structural problems are limiting what your budget can achieve.
Research from Search Engine Land suggests that small businesses waste around 25% of their PPC budgets through ineffective management. Other analyses put the figure higher for accounts that haven’t been audited in six months or more. The money isn’t disappearing into thin air. It’s going to irrelevant search queries, poorly structured campaigns, broken tracking, and bid strategies that don’t match the account’s actual conversion volume.
A proper audit finds these problems. Here’s how to run one that actually changes outcomes, not just generates a report.
Start With Conversion Tracking, Not Campaigns
Most audit guides tell you to start with campaign structure. They’re wrong. Start with tracking. If your conversion tracking is broken, inaccurate, or incomplete, nothing else you audit will make sense because the data you’re looking at is already compromised.
Check three things. First, are the right conversions being tracked? A form submission isn’t always a lead. A page view isn’t a purchase. If your primary conversion actions don’t reflect actual business outcomes, your bidding algorithms are optimising for the wrong thing. This is more common than you’d think. PPC Mastery’s research on conversion tracking highlights that misaligned conversion actions are one of the most damaging and least visible problems in paid media accounts.
Second, is the tracking actually firing? Test every conversion action manually. Submit a form. Complete a purchase. Make a phone call. Then verify that each action registers as a conversion in the platform. Broken tags, misconfigured events, and tracking gaps are common, especially after website updates or CMS migrations.
Third, are you double-counting? If the same conversion fires on both a thank-you page and a form submission event, you’re recording one conversion as two. Your cost per conversion looks half of what it actually is. Your bidding algorithm thinks it’s performing twice as well as it is. The cascade of bad decisions that follow from inflated conversion data can quietly destroy account performance for months before anyone notices.
Getting tracking right is foundational. If you find problems here (and you probably will), fix them before moving on to anything else. Auditing a campaign with broken tracking is like checking the fuel efficiency of a car with a broken odometer. The numbers you get back won’t mean what you think they mean.
Account Structure Shapes Everything
With tracking verified, look at how the account is organised. Structure isn’t glamorous, but it dictates how effectively budget gets allocated, how accurately performance can be measured, and how well algorithms can optimise.
A well-structured account has campaigns organised around distinct business objectives, audience segments, or funnel stages. Each campaign contains tightly themed ad groups with closely related keywords and relevant ad copy. Budget flows to the places where it can generate the most value.
A poorly structured account has broad, catch-all campaigns where different intents compete for the same budget. Brand terms and generic terms mixed together. Top-of-funnel awareness campaigns sharing budgets with bottom-of-funnel conversion campaigns. The result is that your most profitable keywords get starved of budget while your least efficient ones consume more than their share.
Common structural problems to look for: campaigns with too many ad groups (making it impossible to manage effectively), ad groups with too many loosely related keywords (diluting relevance and Quality Score), and campaigns that mix fundamentally different intent types (someone searching for your brand name has a completely different intent from someone searching for a generic category term).
If structure is the problem, optimising individual elements within a broken structure won’t fix it. You need to rebuild. That’s uncomfortable, especially if someone spent months setting the account up. But a properly structured account will outperform a poorly structured one within weeks, even before any real optimisation work begins.
The Search Term Audit
This is where most of the wasted spend lives, and it’s where most managers spend the least time.
Pull the search term report for the last 90 days. Sort by cost, highest first. Now work down the list and ask a simple question for each term: would a human with knowledge of this business bid on this query intentionally?
You’ll find terms that are clearly irrelevant. Terms that are vaguely related but never convert. Terms triggered by broad match expansion that bear no resemblance to what you actually sell. Each one represents money that left your account and delivered nothing in return.
The scale of this problem is often staggering. Industry research suggests companies waste an average of 15% of their budget on irrelevant keywords, with poorly managed accounts losing significantly more. One analysis found that accounts without proper negative keyword management can waste up to 76% of their budget on non-converting terms.
The fix is a combination of adding negative keywords (to block irrelevant queries going forward) and reviewing match types (to tighten the relationship between your keywords and the queries they trigger). Optmyzr’s match type study found that exact match outperformed broad match in 56.7% of accounts tested, with a median CPC improvement of 113.5% in favour of exact match. That doesn’t mean you should use only exact match. It means you should be deliberate about where broad match is deployed and how aggressively it’s managed with negatives.
This part of the audit isn’t a one-time exercise. The search term report changes constantly as user behaviour evolves and platform algorithms expand matching. Good PPC management includes regular search term reviews as part of its rhythm. The audit is where you catch up on what’s been missed.
Relevance Scores and What They’re Really Telling You
Every major platform has its own way of rating quality. On paid search, it’s Quality Score, rated 1 to 10. On Meta, it’s the Ad Relevance Diagnostics (quality ranking, engagement rate ranking, conversion rate ranking). LinkedIn uses a relevance score that affects auction competitiveness. The details differ, but the principle is universal: platforms reward relevant, high-quality ads with lower costs and better placement, and penalise poor ones.
Search Engine Land’s analysis of relevance score impact on paid search found that keywords with high quality scores can see CPC reductions of up to 50%, while poor scores inflate costs by up to 400%. The spread isn’t a marginal difference. It’s the difference between a profitable campaign and one that can’t sustain itself. And while Meta and LinkedIn don’t publish the same granular cost multipliers, the auction mechanics work the same way: higher relevance means lower costs.
During your audit, pull relevance metrics across your active platforms. On paid search, sort by Quality Score and look at keywords below 5 (which are actively costing you more) and those at 5 to 6 with high spend (where improvement yields the biggest savings). On Meta, check Ad Relevance Diagnostics for campaigns with high frequency but declining performance. On LinkedIn, look at relevance scores for campaigns where CPCs have been climbing.
The value of these scores in an audit context isn’t the number itself. It’s the diagnostic breakdown. Paid search splits Quality Score into expected click-through rate, ad relevance, and landing page experience. Meta breaks its diagnostics into quality, engagement, and conversion rankings. These tell you exactly where the problem lies: is it the creative, the targeting, or the post-click experience? That specificity turns a vague “performance is declining” into a concrete action plan.
Bid Strategy Assessment
Your bidding strategy should match your account’s current reality, not its aspirational goals.
Check which bidding strategies are in use across your campaigns. Then ask: does this strategy have what it needs to work?
Most platforms need at least 30 to 50 conversions per month for automated bidding to function properly. If your campaigns are running automated bidding strategies but generating fewer conversions than the platform needs, the algorithm is guessing rather than optimising. This applies equally to paid search Smart Bidding, Meta’s Advantage+ optimisation, and LinkedIn’s automated delivery. Stepping back to more manual control might actually improve performance, despite feeling like a regression.
Also check bid strategy status. Are campaigns stuck in “learning” indefinitely? That usually means the conversion volume is too low or the target is too aggressive. Are campaigns in “limited” status? That could mean budget is constraining the algorithm’s ability to hit its targets.
The bidding audit isn’t about finding the “best” strategy. It’s about finding mismatches between strategy and data availability, and correcting them.
Landing Page Alignment
Every ad makes a promise. Every landing page either keeps that promise or breaks it. During your audit, spot-check the journey from keyword to ad to landing page for your highest-spend campaigns.
The questions are straightforward. Does the landing page address the intent behind the search query? Is the offer mentioned in the ad visible on the page? Can a visitor complete the desired action within seconds of landing? Does the page load in under three seconds on mobile?
Every major platform factors landing page experience into its quality and relevance calculations. Research on relevance scoring consistently shows that landing page experience is one of the key determining factors. An irrelevant or slow landing page doesn’t just lose conversions. It increases your cost per click across every auction on every platform.
This is one of the most overlooked areas in PPC audits because it sits at the boundary between paid media and web development. Nobody owns it, so nobody checks it. Your audit should.
Budget Allocation and Pacing
Pull your campaign budgets and compare them to performance. Are your highest-performing campaigns budget-constrained while underperforming campaigns have excess budget? This misallocation is common and expensive.
Look at impression share data. If your best campaigns are losing significant impression share due to budget, they could be generating more conversions with more investment. Conversely, campaigns with full impression share but poor conversion rates might be overallocated.
Budget pacing tells a similar story. Are campaigns exhausting their daily budget early in the day, missing out on afternoon and evening traffic that might convert differently? Are monthly budgets being paced evenly, or is there a rush of spend at the start of the month followed by a trickle at the end?
The goal of the budget audit isn’t to spend more. It’s to ensure the money you’re already spending is distributed in proportion to opportunity. Moving budget from an underperforming campaign to one that’s capped by budget is often the highest-impact change you can make, and it doesn’t cost you a penny more.
The Competitor Context
Your campaigns don’t exist in isolation. An audit should include at least a basic assessment of competitive positioning.
Use Google’s Auction Insights report to see who you’re competing against and how your impression share, overlap rate, and position compare. On Meta, review what competitors are running through the Ad Library. On Microsoft Ads, check auction insights for the same patterns.
This isn’t about copying competitors. It’s about understanding whether changes in your performance are driven by your own account issues or by shifts in competitive behaviour. A rising cost per click might mean your account needs work. It might also mean a new competitor has entered the market and is bidding aggressively. The response to each situation is different, and without the competitive context, you’re guessing.
Turning the Audit Into Action
An audit that produces a list of findings but no action plan is just an expensive status report. Every finding should translate into a specific, prioritised action.
Rank your findings by impact and effort. Fixing broken conversion tracking is high impact and relatively low effort. That goes to the top of the list. Rebuilding account structure is high impact but significant effort. That needs planning and a phased approach. Tweaking ad copy on a low-spend campaign is low impact. That goes to the bottom, or doesn’t make the cut at all.
Set a realistic timeline. Not everything can or should be fixed at once. Prioritise the changes that will improve data quality first (tracking and structure), because those improvements make every subsequent optimisation more effective.
Then schedule the next audit. Quarterly is the minimum cadence for actively running accounts. If your account is large, complex, or managed by a third party, monthly audits of specific components (search terms one month, Quality Scores the next, landing pages the next) keep things manageable without letting problems fester.
The Real Value of an Audit
A PPC audit isn’t a punishment for bad performance. It’s maintenance. The same way you’d service a car or review your financial accounts, your ad campaigns need regular, systematic review to catch the slow-moving problems that dashboards don’t surface.
If your PPC reports tell you things are “fine” but your revenue doesn’t reflect it, the audit is where you find the gap. If your agency tells you the account is “fully optimised” but you’ve never seen an audit, ask for one. The response will tell you everything you need to know about the quality of management you’re receiving.
The businesses that get consistently good results from PPC aren’t the ones who set up campaigns and hope for the best. They’re the ones who treat their ad accounts as living systems that need regular inspection, maintenance, and improvement.
Audit yours. You’ll find money you didn’t know you were losing, and opportunities you didn’t know you had.
