Low Performing Keywords in Google Ads: How to Find Them, Fix Them, or Cut Them

TL;DR: Low performing keywords in Google Ads are keywords that consume budget without delivering meaningful clicks, conversions, or revenue. They drag down Quality Score, inflate your CPC, and quietly bleed spend month after month. This guide covers how to identify them, which metrics actually matter, and when to pause, optimize, or cut them entirely.

Every Google Ads account has dead weight. Keywords that looked promising when you added them but now just sit there burning cash like a candle nobody's watching. Maybe they made sense during a campaign launch. Maybe they were pulled from a competitor's site or a keyword tool that promised high intent. Either way, they're in your account now, and they're costing you.

The uncomfortable truth is that low performing keywords aren't just a minor inconvenience. They inflate your average CPC, pull down your Quality Score, and muddy your data so it's harder to see what's actually working. Left unchecked, they're the reason accounts slowly get more expensive over time without any clear explanation.

This is a practical, reference-quality guide for anyone managing PPC campaigns. Whether you're a freelancer auditing a new client account, an agency manager juggling a dozen campaigns, or an in-house marketer trying to stretch a tighter budget, this is the framework you need to find underperforming keywords, diagnose why they're struggling, and decide what to do about them.

What Actually Makes a Keyword "Low Performing"?

Let's get specific, because "low performing" gets thrown around loosely. In Google Ads, a low performing keyword is one that fails to deliver meaningful results relative to the spend it consumes. That usually shows up as poor CTR, high cost per conversion, low Quality Score, or simply zero conversions over a time window that should have produced some.

But here's the nuance most guides skip: low performing is always relative to your account goals and industry context. A 1.5% CTR might be completely acceptable for a niche B2B software keyword. In e-commerce, that same CTR on a high-volume shopping-intent keyword would be a red flag. A cost per conversion of $120 could be perfectly profitable for a SaaS company with strong customer lifetime value, and completely unsustainable for a local service business with thin margins. Understanding what is considered a well-performing campaign gives you the baseline you need to evaluate keyword health.

So before you start flagging keywords as underperformers, anchor your evaluation to your actual targets: your target CPA, your acceptable conversion rate range, and your minimum CTR threshold for the type of campaign you're running.

There's also a trap worth calling out: the low data trap. A keyword with 50 impressions and zero conversions isn't necessarily a bad keyword. It just hasn't had enough exposure to prove itself either way. In most accounts I audit, there's a mix of genuinely underperforming keywords and keywords that are simply under-resourced or under-trafficked. Google even flags some keywords with a "low search volume" status, meaning they're not triggering ads at all because the query volume is too thin. Those keywords aren't wasting budget, they're just clutter. Don't confuse them with active underperformers.

The real low performers are keywords with meaningful spend and nothing to show for it. Those are the ones that need your attention first.

The Metrics That Expose Underperforming Keywords

If you want to find low performing keywords in Google Ads, you need to know which numbers to look at and in what order. Here's the stack of metrics that matter most.

CTR (Click-Through Rate): This tells you whether your ad is resonating with the people who see it. Low CTR often signals a mismatch between the keyword's intent and your ad copy. If you're struggling with this metric, our deep dive on why your Google Ads CTR is so low covers the most common causes and fixes. It also directly impacts Quality Score, since expected CTR is one of the three components Google uses to calculate it.

Quality Score: Google scores each keyword from 1 to 10 based on expected CTR, ad relevance, and landing page experience. Keywords scoring 1 to 4 are considered low quality, and Google charges you more for every click because of it. A keyword with a Quality Score of 3 can easily cost two to three times more per click than the same keyword with a score of 7. Low Quality Score is expensive.

Conversion Rate and Cost Per Conversion: These are your bottom-line metrics. A keyword can have a decent CTR and still be a disaster if the traffic it sends never converts. Sort your keywords by cost descending, then look at the conversion column. The keywords with high spend and zero or near-zero conversions are your immediate priority.

Impression Share and Lost IS (Rank): If a keyword has low impression share lost to rank, it means your bids are competitive and your ads are showing. If you're also getting low conversions, the problem is likely relevance or landing page quality, not bidding. This distinction matters a lot for diagnosis.

To pull this analysis in Google Ads, go to your Keywords tab and customize your columns to include Quality Score, Search Impression Share, Lost IS (Rank), and conversion metrics. Then apply a filter: cost greater than your target CPA, conversions equal to zero. That filter alone will surface the most obvious dead weight in your account.

After that, open the Search Terms Report. This is the most underused diagnostic tool in Google Ads. It shows you the actual queries that triggered your ads, not just the keywords you bid on. Understanding the difference between search terms vs keywords in Google Ads is critical for this analysis. In many accounts, this report reveals that a keyword is underperforming not because the keyword itself is bad, but because broad match is pulling in completely unrelated searches. The keyword looks fine on paper; the problem is what it's actually matching to.

Common Reasons Keywords Underperform (and the Fix for Each)

In most accounts I audit, low performing keywords trace back to a handful of recurring causes. Here's what they are and how to address each one.

Too-broad match types pulling in junk traffic: This is the most common culprit by a wide margin. Since Google expanded broad match behavior, a single broad match keyword can trigger an enormous range of queries, many of which have nothing to do with your offer. If your keyword is "project management software" on broad match, you might be showing up for queries like "free task apps for students" or "how to manage a team." Those clicks cost money and convert at near-zero rates. The fix: review your Search Terms Report, add negatives aggressively, and consider tightening to phrase or exact match for your highest-spend keywords.

Poor ad relevance: If your keyword doesn't closely align with the ad copy it's serving, your expected CTR drops, your Quality Score suffers, and your CPC goes up. What usually happens here is that a keyword gets thrown into a broad ad group where the ad copy is generic and doesn't speak to that specific query. The fix: tighter ad group structure. Each ad group should contain closely related keywords that all map to the same core message. If a keyword is in an ad group where it doesn't belong, move it.

Weak landing pages: Google evaluates landing page experience as part of Quality Score. If users click your ad and immediately bounce, that signals a relevance or usability problem. The fix: make sure the landing page speaks directly to what the keyword promises. If your keyword is "CRM for small business," the landing page should immediately confirm that the product is a CRM designed for small businesses. Generic homepages rarely convert well from keyword-specific traffic. Addressing low quality traffic from Google Ads often starts with fixing this landing page mismatch.

Bidding too low for competitive terms: Some keywords underperform not because they're bad, but because you're not competitive enough to show in positions that get clicks. If your impression share lost to rank is high, your bids are the constraint. The fix: either raise bids, improve Quality Score (which effectively lowers the cost to compete), or accept that certain terms are too expensive for your current budget and focus spend elsewhere.

Targeting the wrong intent: A keyword might be relevant to your industry but attract users at the wrong stage of the funnel. Informational queries often convert poorly for commercial offers. "What is CRM software" is not the same as "best CRM for small business." If you're bidding on informational terms and expecting direct conversions, the keyword isn't failing, your expectations are misaligned. The fix: either exclude informational queries with negatives or build a separate campaign with content-focused landing pages and different conversion goals.

When to Pause, Optimize, or Permanently Remove a Keyword

This is where a lot of advertisers get stuck. They know a keyword isn't working, but they're not sure whether to fix it or kill it. Here's a simple decision framework.

Pause it when a keyword has spent two to three times your target CPA with zero conversions and there's no obvious structural fix that hasn't been tried. Pausing is reversible. It stops the bleeding without permanently removing the keyword from your account history.

Optimize it when a keyword is generating some conversions but at too high a cost, or when the Search Terms Report reveals that the keyword itself is sound but the surrounding setup is the problem. Before you give up on a keyword, try: adjusting bids, testing new ad copy, tightening match types, adding negatives to block irrelevant queries, or moving it to a more focused ad group where it gets better ad relevance. Our guide on how to optimize Google Ads keywords walks through this process in detail. Many keywords that look like failures are actually fixable with the right setup.

Remove it permanently when a keyword is consistently triggering irrelevant searches, has a very low Quality Score with no path to improvement, and has been given a genuine optimization attempt that didn't move the needle. Removing it cleans up your account and reduces the noise in your reporting.

The mistake most agencies make is moving too fast in both directions. Either they panic-pause keywords after 20 impressions (not enough data to make a call) or they let underperformers run for six months because nobody has time to audit. Neither approach serves the account well.

A reasonable rule of thumb: give a keyword enough impressions to have a statistically meaningful read on CTR, and enough spend relative to your target CPA to evaluate conversion potential. What "enough" looks like varies by account volume, but in most cases, you need at least a few hundred impressions for CTR and spend equal to two to three times your target CPA to evaluate conversion performance.

A Practical Cleanup Workflow for Your Account

Knowing what to look for is one thing. Having a repeatable process is what actually keeps accounts clean over time. Here's the workflow I recommend running at least once a month.

1. Pull a 30 to 60 day performance report at the keyword level. Set your date range, go to the Keywords tab, and export or review with all relevant columns visible: cost, clicks, impressions, CTR, conversions, cost per conversion, and Quality Score.

2. Sort by cost descending. You want to start with the keywords spending the most money. These are where your biggest wins (and biggest budget waste on bad keywords) are hiding.

3. Flag keywords with high spend and zero conversions. Apply the filter: cost greater than your target CPA, conversions equals zero. This is your priority list.

4. For each flagged keyword, open the Search Terms Report filtered to that keyword. Look at what queries it's actually triggering. Are they relevant? Are there obvious junk terms showing up repeatedly?

5. Add negatives for irrelevant queries. Don't pause the keyword yet if the underlying intent is sound. Block the bad traffic first and see if performance improves.

6. For keywords with no salvageable search term data, pause them and note the reason. Keep a simple log so you're not re-adding the same dead keywords in three months.

7. Repeat monthly. This isn't a one-time project. Search behavior shifts, Google's matching behavior evolves, and new irrelevant queries appear constantly.

For agencies managing multiple accounts, this workflow can eat hours every week if done manually. That's where workflow optimization software makes a real difference. Keywordme, for example, lets you work directly inside Google Ads' Search Terms Report, removing junk terms, adding negatives, and applying match types with single clicks, without exporting to spreadsheets or switching between tools. If you're managing five or more accounts, that kind of workflow compression is worth a lot.

Keeping Your Keyword List Healthy Long-Term

Cleaning up low performing keywords once is useful. Building habits that prevent them from accumulating is what separates well-run accounts from ones that slowly deteriorate.

The most important habit is regular Search Terms Report reviews. Set a recurring task to review search terms weekly or bi-weekly. The goal isn't to catch every irrelevant query immediately, it's to stay close enough to your account's matching behavior that problems don't compound for months before anyone notices.

Build and maintain robust negative keyword lists at both the campaign and account level. Shared negative keyword lists in Google Ads let you apply the same exclusions across multiple campaigns simultaneously. If you're an agency, this is especially valuable because you can maintain industry-specific negative lists and apply them to new client accounts from day one.

Use keyword clustering to keep your ad groups tight. When ad groups contain too many loosely related keywords, ad relevance suffers across the board. Tighter clustering means better Quality Scores, better ad relevance, and more control over which ads show for which queries. Learning how to lower CPC in Google Ads often comes down to exactly this kind of structural improvement.

The compounding benefit here is real. Accounts that are regularly maintained tend to see Quality Scores gradually improve over time, which lowers average CPC, which means the same budget buys more clicks and more conversions. The accounts that get more expensive over time are usually the ones where nobody is doing this work consistently.

The mindset shift worth making: managing low performing keywords isn't a cleanup project you do once a quarter. It's an ongoing discipline, like weeding a garden. Stop weeding and the weeds take over. Stay on top of it and the whole account gets healthier, more efficient, and more profitable over time.

Putting It All Together

Low performing keywords in Google Ads are inevitable. Every account accumulates them. The difference between a profitable account and a money pit is usually whether someone is actively identifying and addressing them or letting them quietly drain budget in the background.

The framework is straightforward: use metrics to identify underperformers (CTR, Quality Score, cost per conversion), diagnose the root cause (match type, ad relevance, landing page, intent mismatch), and take the right action (optimize first, pause if needed, remove when warranted).

Start simple. Pull a 30-day report, sort by cost, filter for zero-conversion keywords, and review the search terms behind your top spenders. That single exercise will surface more actionable insight than most account reviews.

If you want to move faster through that process, especially across multiple accounts, Start your free 7-day trial of Keywordme and see how much time you save when you can remove junk search terms, add negatives, and apply match types directly inside Google Ads without touching a spreadsheet. After the trial it's just $12/month per user, which pays for itself the first time you catch a wasted spend problem before it runs another week.

The keywords that are hurting your account right now aren't hiding. They're in your Keywords tab, waiting for someone to look. Go find them.