What is ad quality?
Ad quality, also known as Quality Score, is a metric in Google Ads that assesses how relevant and user-friendly your ad is for the search it is shown on. It covers both how well the ad copy matches the keywords and the experience users get when they click through to your landing page. Google calculates ad quality as an estimate based on several signals, which together show how effectively your ad meets the user's needs.
Google gives each keyword in your campaign a rating on a scale of 1 to 10. It works as a diagnostic tool you can use to identify ads and keywords that perform below average. The score is affected by, among other things, the expected click-through rate, ad relevance and landing page quality. In other words, ad quality measures how well your ads match both the user's intent and Google's expectations of quality.
That makes ad quality a central part of your work with SEM and performance marketing, where even small changes in relevance can make a big difference to your cost per click and visibility on the search results page.
How do you use ad quality?
You use ad quality as a tool to understand how your search ads perform in terms of relevance and user experience. It's not just about optimising for the sake of the number, but about using the result as a signal of where you can improve your ad. If an ad has low quality, it often points to copy that doesn't match the intent behind the search, or a landing page that doesn't live up to expectations.
Although Quality Score isn't used directly in the ad auction, it matters indirectly through Ad Rank, which is determined by maximum CPC multiplied by Quality Score. Higher ad quality therefore gets you better positions without necessarily increasing your bid budget. That requires you to work strategically with the message, the structure and the landing page experience.
In practice, you typically combine this insight with elements of SEO and conversion optimisation. When you improve the structure and relevance of your pages, it supports both your organic results and your paid ads, because Google recognises the consistency in your content.
Why is ad quality important?
High ad quality makes your campaigns more effective and more cost-efficient. It helps you achieve better ad positions and a lower cost per click, because Google favours relevant ads that give users a positive experience. You get more value from your budget, while also competing more effectively in the ad auction.
Ultimately, it's about quality over quantity. When you understand how users experience your ad, you can optimise your headlines, descriptions and landing pages so they speak directly to their search intent. That creates more engagement and increases the chance of clicks and conversions. At the same time, you improve your brand's visibility and credibility, because your ads come across as more relevant and useful.
What types and variants are there?
In Google Ads, you work with two forms of ad quality assessment. One is the Quality Score itself, the numerical score from 1-10, which is used for diagnostics. The other is the quality rating for responsive search ads, which ranges from "Incomplete" through "Poor", "Average" and "Good" to "Excellent". These levels show how well your ads make use of the available elements and variations, such as the number of headlines and descriptions.
The two measures should be seen as complementary. Quality Score gives you an overview of where you stand in relation to competitors and user behaviour. The qualitative level for responsive ads, on the other hand, shows you specifically how to improve the structure and creativity of your ad content.
How do you work with ad quality in practice?
You typically start by analysing the three factors Google uses to assess your ad: expected click-through rate, ad relevance and landing page experience. That gives you a clear direction for where to focus. A low click-through rate can indicate that the copy doesn't match the keyword closely enough, while a poor landing page experience is often about speed, mobile-friendliness or a lack of consistency between the ad and the page content.
An example of how you work on improving ad quality:
When you work systematically with ad quality, you create a better foundation for optimising Ad Rank and budget allocation. You also make sure your campaign structure becomes more robust over time. At the same time, it becomes easier to connect your SEM work with your other content, branding strategy and campaign design, because every part starts from the user's experience of relevance.
What should you be aware of?
The most important thing to remember is that ad quality isn't about maximising the number of ads, but about improving the quality of the ones you already have. Frequency and reported conversions don't directly affect the rating, so you should focus on relevance, message and technical experience. Google only assesses the parameters the user encounters directly — that is, your ad and landing page.
You also need to be aware that ad quality changes over time. When user behaviour or search trends shift, your ads can lose relevance, even if they previously had high Quality Scores. That's why you should evaluate your campaigns on an ongoing basis and adjust them so you maintain high quality. This is where continuous performance optimisation, creative content and data analysis go hand in hand.
If you use ad quality wisely, it becomes not just a metric, but a tool for creating more effective and relevant campaigns across your marketing activities.
