By a Google Ads Expert & Fiverr Top Rated Seller  •  Updated April 2026  •  15 min read

It was a Monday morning like any other. You open your Google Ads dashboard, coffee in hand, expecting the usual. Then your stomach drops. Your Quality Scores — keywords that were sitting comfortably at 7, 8, even 9 out of 10 — have quietly slipped to 4s and 5s. Your CPCs are creeping up. Your impressions are shrinking. And you have no idea when it started, or why.

If that sounds familiar, you’re not alone. A dropping Quality Score is one of the most disorienting things that can happen inside a Google Ads account — because it doesn’t come with an alarm. It creeps. And by the time you notice, the damage is already done: you’re paying more per click, your ads are showing less, and your competitors are quietly winning auctions you used to dominate.

This guide walks you through exactly what causes a Quality Score to drop, how to diagnose the specific culprit in your account, and the concrete steps to recover it — fast.

What Quality Score Actually Is — And What It Isn’t

Let’s start with a piece of truth that most guides skip: Quality Score is a diagnostic metric, not an auction input. Google has said this explicitly. The number you see on a scale of 1–10 next to your keywords is a report card, not a real-time lever that directly controls your ad auction. But here’s the catch — the components that make up your Quality Score (Expected CTR, Ad Relevance, and Landing Page Experience) absolutely influence your Ad Rank and therefore your cost-per-click and ad position.

Think of it this way: the number itself is the thermometer. Your actual health is the Ad Rank. When your Quality Score drops, it’s telling you something is wrong with one or more of its three components — and that something is quietly costing you money, whether the number reads 5 or 3.

1–2	3–4	5–6	7–8	9–10
Critical — Paying 50%+ more	Poor — Leaking budget	Average — Room to save	Strong — Winning cheaply	Elite — Max ad rank discount

The Three Pillars Google Uses to Judge You

Every keyword in your account is evaluated on three dimensions. Knowing them is the first step to fixing them:

Component	What Causes It to Drop	Difficulty to Fix
Expected CTR	Weak ad copy, irrelevant headlines, low impression share	Medium
Ad Relevance	Bloated ad groups, mismatched keywords & copy	Easier
Landing Page Experience	Slow load, generic pages, content mismatch, poor mobile UX	Harder

DATA POINT Research into Quality Score weighting suggests that Expected CTR and Landing Page Experience carry more impact on the overall score than Ad Relevance alone. Improving your CTR and landing page often moves the needle faster than rewriting ad copy.

7 Reasons Your Quality Score Is Dropping Right Now

Here’s where we get into the real diagnostic work. These are the most common culprits — and the ones most advertisers either miss or misdiagnose.

1. Your CTR dropped — and Google noticed

This is the silent killer. Your ad copy might not have changed at all. But if your competitors refreshed their ads, introduced stronger offers, or your market shifted, your click-through rate relative to expectations can slide without you touching a thing. Google benchmarks your CTR against similar ads in similar auctions. A drop of even a percentage point across a high-volume keyword can trigger a QS downgrade. Industry data puts the average CTR across Google Ads at around 6.66% — anything consistently below that, without a structural reason, is a red flag.

2. You changed your landing page — and broke the experience chain

Landing page changes are the most underestimated QS killer in any account. A redesign, a new A/B test, a developer’s “quick update” — any of these can create a disconnect between what the ad promises and what the user finds. Google now uses a more sophisticated model to evaluate landing page navigation, unexpected destinations, and information clarity. In 2025, this model became even more sensitive to pages that feel like bait-and-switch. If your landing page experience component just tipped to “Below Average” after a page change, that’s your answer.

3. Your ad groups are too broad — diluting your relevance signal

One of the classic structural mistakes: packing dozens of loosely related keywords into one ad group with a single piece of ad copy. When Google sees a keyword like “best running shoes for flat feet” matched to an ad that just says “Shop Running Shoes — Great Selection & Prices,” the relevance score suffers. Tightly themed ad groups — sometimes called SKAGs (Single Keyword Ad Groups) or STAGs (Single Theme Ad Groups) — consistently outperform broad buckets on ad relevance scoring.

4. Negative keywords are missing — and irrelevant traffic is crushing your CTR

Every irrelevant search term that triggers your ad and doesn’t get clicked drags down your expected CTR. If you’re bidding on “accounting software” and showing up for “free accounting software jobs,” those non-clicks pile up. Google sees low engagement and adjusts its CTR expectations downward. This is why negative keyword hygiene is not optional — it’s a direct QS maintenance tool.

5. Your page loads too slowly — especially on mobile

Google’s data shows that even a one-second delay in mobile page load time can reduce conversions by up to 20%. More relevant to QS: slow-loading pages directly damage landing page experience scores because they signal a poor user experience. A page that bounces 80% of mobile visitors is telling Google: “this landing page is not delivering value.” Run your page through Google PageSpeed Insights right now. A score below 70 on mobile is almost certainly hurting you.

6. Your ads aren’t being refreshed — and staleness is setting in

RSAs (Responsive Search Ads) can mask ad fatigue — Google rotates combinations automatically. But if your underlying headlines and descriptions haven’t been touched in months, engagement naturally dips as audiences become familiar with your messaging. Industry guidance suggests reviewing and refreshing ads when CTR drops 25% or more from baseline, or at minimum every four to six weeks for high-impression campaigns.

7. You launched broad match without tightening controls — and the algorithm got confused

Broad match has become increasingly powerful and Google-favored, but it’s also increasingly unpredictable. Without proper negative keyword lists and tight audience signals, broad match can pull your ads into auctions for queries that are thematically distant from your core offering. The result: impressions with no clicks, tanking CTR, and a QS spiral. If you’ve recently shifted match types or adopted Performance Max alongside search campaigns, check for keyword conflicts and search term overlap.

How to Diagnose the Real Cause in Your Account

Don’t guess. Here’s a systematic way to pinpoint exactly which component is failing — and in which campaigns.

Step 1: Surface the data

In your Google Ads account, go to Keywords → Columns → Modify Columns → Quality Score. Add all six columns: Quality Score, Expected CTR, Ad Relevance, Landing Page Experience, and their historical equivalents. Sort by Quality Score ascending. Every keyword with a 5 or below needs attention.

Step 2: Identify the pattern

Look at which component shows “Below Average” most frequently. If it’s primarily Expected CTR across many keywords, your ad copy or offer is the issue. If it’s Landing Page Experience across a campaign, you have a structural page problem. If it’s Ad Relevance on specific keywords, your ad group structure needs a rebuild.

Step 3: Segment by date

Use the Segment → Time → Day view on your keywords table to see when the drop began. Match that date to any changes in your account. A precise start date almost always points directly to the cause.

COMMON MISTAKE Many advertisers start fixing bids when they see QS drop. Don’t. Bid changes won’t fix a relevance or landing page problem — they’ll just make you pay more for the same broken experience. Fix the underlying QS components first, then layer your bidding strategy on top.

The Fixes: A Step-By-Step Recovery Plan

Fix 1: Repair Your Expected CTR

1. 1. Mirror the search query in your headline. If someone searches ’emergency plumber London,’ your headline should feel urgent and specific — not ‘Plumbing Services.’ The language of the searcher and the language of the ad should feel like the same conversation.

1. 1. Strengthen your offer clarity. Vague CTAs (‘Learn More’) consistently underperform specific ones (‘Get a Free Quote Today’ or ‘See Pricing — No Commitment’).

1. 1. Use all available ad assets. Sitelinks, callouts, structured snippets, and price extensions increase your ad’s visual footprint and can dramatically lift CTR — which feeds back into expected CTR scores.

1. 1. Prune irrelevant search terms. Weekly search term reviews and aggressive negative keyword additions keep your CTR clean by eliminating non-clicks from poor-fit queries.

Fix 2: Rebuild Your Ad Relevance

5. 5. Restructure bloated ad groups. Each ad group should have a tight thematic thread. ‘Men’s Running Shoes,’ ‘Women’s Running Shoes,’ and ‘Trail Running Shoes’ should each be separate groups with tailored ad copy — not all jammed into ‘Running Shoes.’

5. 5. Include your core keyword in at least one headline. This doesn’t mean keyword stuffing — it means genuine semantic alignment. Google rewards ads that clearly speak to the search intent.

5. 5. Use Dynamic Keyword Insertion carefully. DKI works in tightly themed ad groups. In broad groups, it often creates awkward headlines that hurt CTR rather than help it.

Fix 3: Overhaul Your Landing Page Experience

8. 8. Match the page to the promise. If the ad says ‘50% Off Running Shoes,’ the landing page needs to lead with that offer — not your general homepage.

8. 8. Fix your page speed — especially mobile. A score below 70 on Google Page Speed Insights (mobile) is a QS liability. Compress images, minimize JavaScript, and consider a CDN.

8. 8. Ensure transparency and trust signals. Google’s updated landing page evaluation specifically flags ‘unexpected destinations’ and poor navigation. Include clear contact information, a privacy policy, and logical page navigation.

8. 8. Stop sending all traffic to your homepage. This is perhaps the single biggest landing page mistake. A homepage is for browsers, not buyers. Create dedicated landing pages for each campaign or ad group theme.

Advanced Tactics: Going From 7 to 9+

Once you’ve stabilized your QS, here’s what separates 7/10 accounts from 9/10 accounts:

Run QS-first, then Smart Bidding

Smart Bidding algorithms perform significantly better when the underlying relevance signals are already strong. A documented case study showed a plumbing business improving QS from 6 to 9 by fixing ad copy and page load times first — only then did Smart Bidding produce stable, improving CPA results. Fix QS first. Layer Smart Bidding second.

Use historical QS data as a trend monitor

The historical Quality Score columns in Google Ads (QS hist., Exp. CTR hist., etc.) show you what scores looked like before recent changes. Track these over time to catch drops early — before they compound. Setting up a weekly monitoring routine for keywords with high spend but QS below 7 should be non-negotiable.

Create segments for high-QS vs low-QS keywords

Separate your keyword lists into those with QS 7 and above versus those below 5. Study what’s different. What do your high-QS keywords have in common? Those patterns are your optimization blueprint for struggling keywords.

EXPERT INSIGHT Quality Score does matter in 2026 — but the framing has evolved. The visible number is a lagging indicator. The real prize is optimizing the underlying components: CTR, relevance, and landing experience. Get those right and the number follows. More importantly, your CPC drops, your Ad Rank improves, and your campaigns become genuinely more competitive.

The Bottom Line: Quality Score Is Telling You Something

A dropping Quality Score isn’t a glitch. It’s a signal — and it’s almost always pointing to a real gap between what your audience is expecting and what your ads and landing pages are actually delivering. The good news is that every component is fixable. Expected CTR improves with sharper copy and cleaner keyword targeting. Ad Relevance tightens with better account structure. Landing page experience lifts when you commit to purpose-built pages that load fast and keep their promise.

The worst thing you can do is ignore the number, or worse — try to bid your way out of a relevance problem. Quality Score is Google’s way of rewarding advertisers who put users first.

Start with your worst-performing keywords, work through the checklist above, and give changes two to four weeks to reflect in your scores. QS is a slow-moving metric in both directions — but when it climbs, your CPCs drop and your campaigns compound in the right direction.