You launched your Google Ads campaign. You set a budget, picked your keywords, wrote what you thought was decent ad copy, and waited. And now you're staring at a dashboard full of disappointing numbers - high costs, low conversions, or worse, nothing at all. Sound familiar?
If you've already read our Google Ads beginner's guide and avoided the common mistakes, but your campaigns still aren't performing, this guide is for you. It's the troubleshooting companion piece - designed for people who are already running ads and can't figure out why they're not working.
We manage PPC campaigns across a wide range of industries, and the same problems come up again and again. What follows are the 10 most common reasons Google Ads campaigns underperform, how to diagnose each one, and exactly what to do about it.
1. Your conversion tracking is broken (or missing entirely)
This is the single most important thing to check first, and it's the one most people skip. If your conversion tracking isn't set up correctly, everything else you do in Google Ads is built on bad data.
What it looks like in your account
- The "Conversions" column shows zero or very few conversions, even with decent click volume
- Your Smart Bidding strategies seem to be running blind - erratic spend, no clear pattern
- You see clicks and traffic in Google Analytics, but Google Ads reports nothing useful
How to diagnose it
Go to Goals > Conversions > Summary in your Google Ads account. Check the status of each conversion action. You're looking for "Recording conversions" - anything else means there's a problem. Then open Google Tag Assistant in your browser and visit your conversion page (thank you page, confirmation page, etc.) to verify the tag actually fires.
The fix
Make sure your Google Ads tag or Google Tag Manager container is on every page of your site. Verify that conversion events fire on the correct pages - form submissions, purchases, phone calls, whatever matters to your business. If you're using enhanced conversions, check that first-party data is being passed correctly. And make sure your primary conversion actions are set to "Primary" rather than "Secondary" - secondary actions don't feed into Smart Bidding.
In our experience, broken conversion tracking is the most common cause of the "my ads aren't working" complaints we hear from new clients, so fix this before touching anything else.
2. You're using broad match without guardrails
Google loves broad match. They recommend it constantly. And in fairness, it can work - but only when it's paired with strong conversion data, Smart Bidding, and active negative keyword management. Without those guardrails, broad match is a budget incinerator.
What it looks like in your account
- High impressions and clicks, but poor conversion rates
- Your search terms report is full of queries that have nothing to do with your business
- Cost per conversion keeps climbing with no improvement in lead quality
How to diagnose it
Go to Insights & Reports > Search terms and review what people actually searched before clicking your ad. If you see irrelevant queries - people searching for jobs in your industry, looking for free resources, or searching for competitors - your match types are too loose.
The fix
If you're a small business with limited budget and fewer than 30 conversions per month, switch your high-intent keywords to phrase match or exact match. Save broad match for campaigns where you have strong conversion data and are using a Smart Bidding strategy like Target CPA or Target ROAS. And regardless of match type, check your search terms report weekly; that part is non-negotiable.
3. You're not using negative keywords
This is the flip side of the match type problem. Even with phrase match or exact match keywords, Google can still show your ads for searches that include irrelevant modifiers. Negative keywords are the only way to filter those out.
What it looks like in your account
- You're paying for clicks from people searching for "free," "jobs," "salary," "DIY," or "reviews"
- Your click-through rate is decent, but conversion rate is poor
- You're getting leads or enquiries that are completely unqualified
How to diagnose it
Pull your search terms report for the last 30-60 days. Sort by cost (highest first) and review every search term that drove spend but didn't convert. Look for patterns - categories of irrelevant traffic that keep appearing.
The fix
Build a negative keyword list and add it at the campaign or account level. Start with the obvious ones: "free," "jobs," "how to," "salary," "cheap," "DIY." Then add industry-specific negatives based on what your search terms report shows. Review and update this list at least fortnightly. For some of our clients, a well-maintained negative keyword list has brought cost per lead down noticeably within the first month.
4. Your landing pages aren't converting
You can have the best campaign structure in the world, but if people click your ad and land on a page that's slow, confusing, or irrelevant, you're throwing money away. Google knows this too - landing page quality directly affects your Quality Score, which affects how much you pay per click.
What it looks like in your account
- Good click-through rate but poor conversion rate (below 2-3% for most industries)
- High bounce rate in Google Analytics for your ad landing pages
- Quality Score of 5 or below on your core keywords, with "landing page experience" flagged as "below average"
How to diagnose it
Click your own ad and experience the landing page as a customer would. Ask yourself: Does this page clearly match what the ad promised? Is there an obvious call to action above the fold? Does it load in under 3 seconds on mobile? Is the form simple enough that someone would actually fill it out?
The fix
Your landing page should do three things: confirm the visitor is in the right place (message match with the ad), explain your value proposition quickly, and make it dead simple to take the next step. Remove navigation menus that lead people away. Keep forms short - name, email, phone, and maybe one qualifying question. Make sure the page loads fast on mobile. And if you're sending ad traffic to your homepage, stop. Build dedicated landing pages for your highest-spend campaigns. This is where conversion rate optimisation pays for itself many times over.
5. Your bidding strategy is wrong for your situation
Google's automated bidding strategies are powerful, but they need data to work. If you're using Target CPA or Target ROAS on a campaign that gets five conversions a month, the algorithm simply doesn't have enough information to optimise effectively.
What it looks like in your account
- Impressions and clicks have dropped significantly since you switched bidding strategy
- Your campaign is "Limited by bid strategy" in the status column
- Cost per conversion has increased, or conversions have dried up entirely
How to diagnose it
Check your bid strategy report under Tools & Settings > Bid strategies. Look at the learning period status and whether your targets are realistic. Then check your conversion volume - Google generally needs at least 30 conversions per month at the campaign level (ideally more) for Smart Bidding to work properly.
The fix
If you don't have enough conversion volume, step back to Manual CPC or Maximise Clicks until you've built up enough data. If you're using Target CPA, make sure your target is realistic - set it at or slightly above your historical average cost per conversion, not where you wish it was. Setting a target CPA of €20 when your actual average is €80 will cause Google to stop showing your ads almost entirely.
Once you have consistent conversion data (30+ per month), switch to Maximise Conversions or Maximise Conversion Value, then layer on target CPA or target ROAS after a few weeks of stable performance.
6. Your budget is too thin
This is uncomfortable, but it needs saying: some businesses don't spend enough on Google Ads for the platform to work. If your daily budget is €10 in a competitive market where clicks cost €5-8, you're getting maybe one or two clicks per day. That's not enough data for Google to optimise, and it's not enough traffic to generate meaningful results.
What it looks like in your account
- "Limited by budget" appears on most or all of your campaigns
- Your impression share is below 30-40%
- You're running five different campaigns with €10/day each instead of concentrating your spend
How to diagnose it
Check your Impression Share columns (you may need to add them to your view). Look at "Search Impression Share Lost (Budget)" - if that number is above 30%, your budget is holding you back. Also look at whether you're spreading budget across too many campaigns.
The fix
If you can't increase your overall budget, consolidate. Rather than running five campaigns at €10/day, run one or two campaigns at €25-50/day focused on your highest-intent, highest-converting keywords. It's better to show up consistently for a small number of valuable searches than to barely show up across a broad range of terms. And if your cost per click means that €20/day only buys two or three clicks, be realistic about whether Google Ads is the right channel for your current budget. Sometimes organic SEO is a better starting point.
7. Your ad copy doesn't stand out
With responsive search ads, Google assembles your headlines and descriptions into different combinations. But if the raw ingredients are bland, no combination is going to perform well.
What it looks like in your account
- Low click-through rate (below 3-4% on Search campaigns)
- Your ads are showing, but people aren't clicking
- Ad strength showing as "Poor" or "Average"
How to diagnose it
Look at your ad-level data and check CTR by ad. Then look at what your competitors' ads look like - search for your own keywords in an incognito window and compare your ads to theirs with a critical eye. Are you saying the same generic things as everyone else?
The fix
Your headlines need to do three things: match the search intent, differentiate you from competitors, and include a clear reason to click. Stop writing headlines like "Professional Services" or "Quality You Can Trust" - those could be for any business in any industry. Instead, be specific: mention your location, your pricing model, a concrete benefit, or a time-sensitive offer. Use at least 3-4 distinct headline angles (benefit, feature, social proof, urgency) so Google has genuinely different combinations to test.
And don't neglect your ad extensions (now called assets). Sitelinks, callouts, structured snippets, and call extensions take up more real estate on the page and improve your click-through rate significantly.
8. You're not tracking the right conversions
This is different from broken conversion tracking. Here, your tracking works - but you're measuring the wrong things. Counting page views, time on site, or PDF downloads as conversions gives Google's algorithm the wrong signals about what a valuable interaction looks like.
What it looks like in your account
- Your "conversions" column shows impressive numbers, but your actual business results (leads, sales, revenue) don't match
- Smart Bidding is optimising for low-value actions instead of real business outcomes
- You're seeing lots of "conversions" but your phone isn't ringing and your inbox is empty
How to diagnose it
Go to Goals > Conversions > Summary and review every conversion action. Ask yourself: "If someone completes this action, would my sales team consider it a lead?" If the answer is no, it shouldn't be a primary conversion.
The fix
Keep only meaningful business actions as primary conversions - form submissions, phone calls, purchases, quote requests. Move everything else (page views, newsletter signups, video watches) to secondary conversion actions. Secondary actions still get tracked, but they won't be used by Smart Bidding to optimise your campaigns. This single change can transform campaign performance because Google's algorithm starts optimising for what actually matters to your business.
9. Your targeting is too broad
If you're a plumber in Dublin and your ads are showing to people in Cork, Galway, and Limerick, you're wasting money. If you're a B2B SaaS company targeting "software" as a keyword, you're competing with every tech company on the planet.
What it looks like in your account
- High impressions but low relevance - clicks from locations you don't serve or audiences that don't match
- Your geographic report shows spend in areas outside your service area
- Your audience segments show you're reaching people with no connection to your ideal customer
How to diagnose it
Check your Location report (Insights & Reports > When and Where > Locations). Look for clicks and spend from areas you don't serve. Then check your geographic targeting settings - Google's default is "Presence or interest," which means someone in London searching for "plumber Dublin" could see your ad. That's not always useful.
The fix
Tighten your location targeting to "Presence: People in or regularly in your targeted locations." Exclude geographic areas that consistently waste budget. For Search campaigns, opt out of the Search Partner Network if it's delivering poor results - segment your data by Network to check. And if you're running Display or Performance Max campaigns, review your placement reports to see where your ads are actually showing. You might be surprised.
10. You're ignoring the search terms report
The search terms report is the single most underused tool in Google Ads. It shows you exactly what people typed into Google before clicking your ad. If you're not reviewing it regularly, you're flying blind.
What it looks like in your account
- You've never looked at the search terms report, or you check it once every few months
- Your campaigns have been running for months with no new negative keywords added
- You're spending money on clicks but have no idea whether those clicks are from qualified prospects
How to diagnose it
Go to Insights & Reports > Search terms. Sort by cost (highest first). Read through the actual queries. You'll almost certainly find searches that have nothing to do with your business - and you've been paying for every one of those clicks.
The fix
Make search term review a weekly habit. Every week, spend 15-20 minutes reviewing new search terms. Add irrelevant terms as negative keywords. Look for high-performing search terms that you haven't added as keywords yet - these are free insights into what your customers are actually searching for. Over time, this single habit will make your campaigns progressively more efficient. The best-performing Google Ads accounts we manage are the ones where search term hygiene is treated as routine maintenance, not an occasional task.
The bigger picture: why regular optimisation matters
If there's one theme that runs through all 10 of these problems, it's this: Google Ads is not a set-and-forget platform. The campaigns that deliver strong, consistent results are the ones that get regular attention - weekly search term reviews, monthly bid strategy assessments, ongoing landing page testing, and continuous refinement of targeting.
Google's automation and Smart Bidding have made campaign management easier in some ways, but they've also made it easier to assume everything is fine when it's not. Auto-applied recommendations, broad match defaults, and expanding targeting settings all push your campaigns toward spending more and reaching wider audiences - which may or may not be what you actually need.
The businesses that get the best results from PPC advertising are the ones that treat it as an ongoing investment in attention and refinement, not a one-time setup.
When to bring in a PPC agency
Most of the fixes in this guide are things you can do yourself, as long as someone can give the account an hour or two every week. It makes sense to bring in help when you've worked through the list and the numbers still don't add up. It also makes sense when nobody has time for the weekly reviews, or when a small drop in cost per lead would pay for the help.
Whoever you hire, ask how they will check your conversion tracking, how often they will review search terms and what they will report each month. Our PPC management starts by fixing the tracking, then moves budget each week towards the ads that bring in customers. The ad account stays in your name. If most of your budget goes on Google Search, our Google Ads management page explains how we run those campaigns.
Key takeaways
- Check conversion tracking first - broken or misconfigured tracking is the most common reason campaigns "aren't working." Fix this before you touch anything else.
- Review your search terms report weekly - this single habit will improve your campaign performance more than any other optimisation.
- Match your bidding strategy to your data - don't use Smart Bidding until you have at least 30 conversions per month. Set realistic targets based on historical performance, not aspirational goals.
- Consolidate rather than spread thin - one well-funded, focused campaign will outperform five underfunded ones every time.
- Your landing page is half the equation - the best campaign structure in the world can't overcome a poor landing page experience.
- Be specific in your ad copy - generic headlines get ignored. Mention your location, concrete benefits, and clear reasons to choose you over competitors.
- Don't let Google run on autopilot - auto-applied recommendations and default settings often work in Google's favour, not yours. Review and control these manually.
Still struggling? We can help
If you've worked through this list and your campaigns still aren't delivering, the issue might be deeper than a single setting or strategy. Sometimes it takes a fresh set of eyes to spot what's going wrong - and more importantly, what the opportunity looks like when things are working properly.
We offer a free website audit: we'll look over your site, including the landing pages your ads send people to, before a free 20-minute call, then walk you through what we'd fix first. See what we've done for other businesses, then get in touch.