How to Find What's Wrong with Google Ads: A Step-by-Step Diagnostic Guide

TL;DR: If your Google Ads campaigns are burning budget without results, this guide walks you through a systematic diagnostic process—from checking basic setup issues to auditing your search terms, keywords, and bidding strategy. Follow these steps in order to pinpoint exactly what's broken and fix it fast.

You've got campaigns running, budget spending, clicks happening—but conversions? Crickets. Or maybe your cost-per-click suddenly spiked, your impression share dropped, or your CTR tanked overnight. Something's clearly off, but Google Ads isn't exactly handing you a "here's what broke" notification.

Finding what's wrong with Google Ads campaigns is one of the most common (and frustrating) tasks for marketers, freelancers, and agency owners. The interface is complex, there are dozens of variables that can go sideways, and the problems often compound each other—making it hard to know where to start.

This guide gives you a structured, step-by-step diagnostic process. Think of it like the checklist a seasoned PPC pro runs through when a client's account is underperforming. We'll start with the highest-impact areas first and work down to the more nuanced issues. By the end, you'll know exactly where to look, what signals to pay attention to, and how to take action without wasting another dollar.

In most accounts I audit, the root cause of underperformance comes down to one of four buckets: setup errors, search term pollution, ad and landing page misalignment, or broken tracking. The steps below map directly to those buckets. Let's get into it.

Step 1: Check Campaign Status and Basic Setup Issues

Before you go deep on keywords and bidding, check the obvious stuff. You'd be surprised how often a campaign is "running" but barely delivering because of a simple setup issue that slipped through.

Start at the campaign level and verify that your campaigns, ad groups, and ads are all actually active. A paused ad group or a disapproved ad can silently kill performance. Go to the Ads tab and filter by status—look specifically for anything marked "Disapproved," "Limited," or "Eligible (Limited)."

Billing and payment issues: These are sneaky. A failed payment can pause delivery entirely without any obvious alert in the campaign dashboard. Check under Tools and Settings > Billing > Summary to confirm everything is current and no payment failures are logged.

Campaign dates and ad scheduling: Check if any campaigns have an end date that's already passed. Also pull up the ad schedule under campaign settings—your ads might only be running during off-peak hours, or they might be completely excluded from the times your audience is most active.

Network settings: This one catches a lot of people. If you're running a Search campaign but the "Search Partners" or "Display Network" boxes are checked, you may be serving impressions in places that don't convert for your business. Most advertisers running tight Search campaigns should have both of those unchecked until they've validated core performance. If you're just getting started, reviewing common Google Ads setup mistakes can save you from these early pitfalls.

Budget caps: If a campaign shows "Limited by budget," it's not delivering as many impressions as it could. This isn't always a problem, but it's worth flagging early because it affects how you interpret impression share data later.

Success indicator: All active campaigns show "Eligible" status, ads are approved, billing is current, and scheduling aligns with when your target audience is searching.

Step 2: Audit Your Search Terms Report for Wasted Spend

This is the highest-leverage step in any Google Ads diagnostic. The Search Terms Report shows you the actual queries that triggered your ads—not the keywords you bid on, but the real searches people typed before clicking. In most underperforming accounts, this report is a goldmine of wasted spend.

Navigate to Keywords > Search Terms. Sort by cost descending. What you're looking for immediately is search terms that have no logical connection to your product or service. These are budget killers—clicks from people who were never going to convert, funded by your ad spend.

What to flag in the Search Terms Report:

High-spend, zero-conversion terms: Any search term that's consumed a meaningful chunk of budget and hasn't produced a single conversion is a candidate for a negative keyword. Set a threshold based on your target CPA—if a term has spent 2x your target CPA without converting, it's worth excluding.

Irrelevant queries: These are the obvious ones. If you're selling B2B software and you're showing up for "free software download" or "how to use [competitor name]," those need to be negated immediately. Learning how to stop Google Ads showing for wrong searches is one of the most impactful skills you can develop as an advertiser.

High-intent terms not yet in your keyword list: This is the flip side. Sometimes the Search Terms Report reveals queries that are converting well but aren't in your keyword list as exact or phrase match. These are opportunities to add them as controlled keywords with appropriate bids.

Broad match keywords are usually the biggest culprits for search term pollution. They can trigger searches that are semantically related but commercially irrelevant. If you're running broad match without a solid negative keyword strategy, expect to find a lot of noise in this report.

The challenge with this step is the manual effort. Traditionally, you'd export the Search Terms Report to a spreadsheet, sort it, tag terms, and then manually add negatives back in Google Ads. That workflow is slow and error-prone. If you want to move faster, there are proven ways to review the Google Ads Search Terms Report faster without sacrificing thoroughness.

Tools like Keywordme let you do this entire workflow directly inside the Google Ads interface. You can review search terms, add negatives with a single click, and build keyword lists without ever leaving the Search Terms Report. For anyone doing this regularly—which you should be—it cuts the process down significantly.

Success indicator: You can identify at least 5 to 10 irrelevant or low-quality search terms to exclude, and you've spotted at least a few high-intent terms worth adding to your keyword list.

Step 3: Diagnose Keyword-Level Performance Problems

Once you've reviewed search terms, zoom out to the keyword level. The Search Terms Report tells you what's happening in the wild; the Keywords tab tells you which of your own keywords are working and which are dragging everything down.

Sort your keywords by cost descending. Your highest-spend keywords deserve the most scrutiny. For each of your top spenders, look at three things: Quality Score, CTR, and conversion rate.

Quality Score breakdown: Google breaks Quality Score into three components—Expected CTR, Ad Relevance, and Landing Page Experience. A keyword with a Quality Score below 5 is costing you more per click than it should. Low Quality Score directly inflates CPC because Google charges you more to compete at the same ad position. Hover over the Quality Score column to see which component is underperforming. If you're dealing with this issue, a dedicated guide on how to improve Google Ads Quality Score can walk you through targeted fixes.

High impressions, low CTR: Keywords racking up impressions but not clicks are a signal that either your ad copy isn't resonating with the search intent, or the keyword is too broad and triggering irrelevant searches. Both problems need different fixes—one is a copy problem, one is a match type or negative keyword problem.

Match type distribution: Are you over-relying on broad match? Pull a breakdown of your keyword match types. If the majority of your spend is on broad match without robust negative keyword coverage, that's a structural problem. Broad match has its place, but it needs guardrails.

Status flags to watch: Look for keywords marked "Low search volume"—these aren't doing anything for you. Also watch for "Rarely shown due to low Quality Score," which means Google is essentially deprioritizing your keyword in the auction.

What usually happens here is that a handful of broad keywords are consuming most of the budget, while the tighter, more intentional keywords barely get impressions. Rebalancing that distribution is often one of the fastest ways to improve account efficiency.

Success indicator: You've identified which keywords are dragging down performance and which are profitable, and you have a clear picture of Quality Score issues to address.

Step 4: Evaluate Ad Copy and Landing Page Alignment

Traffic is only valuable if it converts. This step is about diagnosing the gap between what your ads promise and what your landing pages deliver—because that gap is often where conversions die.

Start with CTR by ad variation. In Responsive Search Ads, you can see how individual headline and description combinations perform. Low CTR across the board usually signals one of two things: the messaging doesn't match what the searcher is looking for, or the value proposition isn't compelling enough to earn the click.

Check Ad Strength ratings: Google's Ad Strength indicator in RSAs gives you a quick read on copy quality. "Poor" or "Average" ratings usually mean you have too many similar headlines, you're not using enough keyword coverage, or your descriptions are too generic. These aren't definitive performance signals, but they're a useful starting flag.

Headline keyword inclusion: Does your primary keyword appear in at least one headline? This matters for both Ad Relevance (a Quality Score component) and for CTR—searchers are more likely to click when they see their query reflected back in the ad.

Landing page relevance: This is where a lot of campaigns quietly fail. The ad promises one thing, the landing page delivers something else (or nothing specific at all). Go through each ad group's destination URL and ask: if someone searched for this keyword and clicked this ad, does the page immediately answer what they came for? If the answer is "sort of," that's a conversion problem waiting to happen.

Load speed and mobile experience: These directly impact both Quality Score (Landing Page Experience component) and conversion rate. A page that loads slowly on mobile is losing conversions silently. Use Google's PageSpeed Insights to check your key landing pages if you haven't recently.

Conversion rate by ad group: Pull this metric and look for ad groups where traffic is landing but not converting. That pattern almost always points to a landing page alignment issue rather than a traffic quality issue. If this is a recurring problem, a focused approach to improving your Google Ads conversion rate can help you systematically close the gap.

Success indicator: Your top ads have CTR above your account average, and your landing pages directly address the search intent of the ad group they're connected to.

Step 5: Review Bidding Strategy and Budget Allocation

Bidding issues are often invisible until you know what to look for. A campaign can appear to be running fine while a misconfigured bidding strategy quietly limits performance or burns budget in the wrong places.

Limited by budget: Start here. Any campaign showing this status is being capped before it can reach its potential impression share. This isn't always a problem—sometimes you're intentionally capping spend—but it does mean you're leaving impressions on the table. If a high-performing campaign is limited by budget, that's a case for reallocation from weaker campaigns. Understanding how to set campaign budgets in Google Ads strategically makes this reallocation process much more straightforward.

Smart Bidding readiness: Target CPA and Target ROAS are powerful, but they need conversion data to function well. The general guidance from Google is that Smart Bidding strategies perform better with a meaningful volume of recent conversions to learn from. If you've just launched a campaign or recently changed your conversion tracking, Smart Bidding may be in a learning phase—or worse, optimizing toward insufficient data. Check the "Bid strategy status" column for any campaigns showing "Learning" or "Limited."

Impression Share breakdown: Google provides two types of lost impression share: lost due to budget and lost due to rank. These diagnose different problems. Lost IS (budget) means you need more spend or better allocation. Lost IS (rank) means your Quality Score or bids aren't competitive enough. Don't confuse the two—they require completely different fixes.

Bid adjustments: Check your device, location, and audience bid adjustments. A negative bid adjustment that made sense six months ago might now be suppressing delivery for a segment that's actually converting well. Pull performance data segmented by device and location to see if any adjustments are working against you.

CPC spikes: If your average CPC has increased recently, that's usually tied to one of three things: increased competition in the auction, broad match expansion triggering more expensive queries, or a drop in Quality Score making you pay more for the same position. Knowing how many conversions Google Ads needs to optimize Smart Bidding effectively helps you set realistic expectations during this phase.

Success indicator: You can explain why your budget is being spent the way it is, and you've identified at least one bidding or budget inefficiency worth addressing.

Step 6: Check Conversion Tracking and Attribution

This step comes last in the diagnostic, but a broken conversion setup can invalidate everything else you've looked at. If your conversion data is wrong, every optimization decision you've made based on it is also wrong.

Start by verifying that your conversion actions are actually firing. Use Google Tag Assistant (the Chrome extension) to walk through a conversion on your site and confirm the tag fires correctly. Alternatively, check the Conversions report under Tools and Settings > Measurement > Conversions and look at the "Status" column for any actions showing "Inactive" or "No recent conversions."

Duplicate conversion tracking: This is one of the most common errors in accounts I audit. It happens when a conversion action is tracked both through Google Ads and Google Analytics (imported), or when a tag fires multiple times per session. Duplicate tracking inflates your conversion numbers and causes Smart Bidding to optimize toward phantom data. Check your conversion actions list and make sure you're not counting the same conversion twice.

Attribution model: The attribution model you're using determines which campaigns get credit for conversions. Data-driven attribution is generally the most accurate, but if you're on last-click, you may be over-crediting bottom-funnel campaigns and under-crediting the campaigns doing the awareness work. This matters when you're trying to diagnose which campaigns are "working." A deeper look at how to read Google Ads reports properly will help you interpret attribution data with more confidence.

All Conversions vs. Conversions column: These are different. "Conversions" only counts actions you've designated as primary. "All Conversions" includes secondary actions too. Make sure you understand what's in each column and that your bidding strategies are optimizing toward the right one.

Conversion windows: If your sales cycle is longer than your conversion window, you're missing credit for conversions that happen after the window closes. Review whether your windows match your actual customer journey.

Success indicator: Conversion data in Google Ads matches what you see in your CRM or analytics platform, with no duplicate actions and a clear understanding of what's being counted.

Putting It All Together: Your Google Ads Diagnostic Checklist

Here's the full six-step process as a quick-reference checklist you can run through any time an account starts underperforming:

1. Campaign status and setup: Verify active status, check billing, review ad scheduling, confirm network settings.

2. Search Terms Report audit: Identify irrelevant queries, add negatives for high-spend/zero-conversion terms, flag high-intent terms to add as keywords.

3. Keyword-level performance: Sort by cost, review Quality Score components, check match type distribution, flag low-volume and low-QS keywords.

4. Ad copy and landing page alignment: Review CTR by ad variation, check Ad Strength, verify keyword inclusion in headlines, assess landing page relevance and load speed.

5. Bidding strategy and budget: Check for budget-limited campaigns, assess Smart Bidding data readiness, review Impression Share breakdown, audit bid adjustments.

6. Conversion tracking: Verify tags are firing, check for duplicates, review attribution model, confirm conversion windows match your sales cycle.

Most Google Ads problems fall into one of four buckets: setup errors, keyword and search term issues, ad and landing page misalignment, or tracking problems. Running through this checklist in order helps you isolate the real issue instead of guessing.

One important note on cadence: this diagnostic isn't just for emergencies. The search terms audit in particular should be part of your weekly routine. Search behavior shifts constantly, and new irrelevant queries appear every week. Waiting until something breaks to review your search terms means you're always playing catch-up.

If you want to speed up the search terms step, Start your free 7-day trial of Keywordme. It lets you review search terms, add negatives, and build keyword lists with one-click actions directly inside Google Ads—no spreadsheets, no exporting, no switching tabs. After the trial it's $12/month per user, which pays for itself quickly when you're cutting wasted spend on irrelevant queries every week.