Google Ads Quality Score: Key Factors in Ad Optimization

Some advertisers might think that the factor that can optimize ad performance on Google Ads is a large budget. In fact, other factors are equally important, namely the Google Ads quality score.

The quality score is not ordinary because it can make your ad outperform competitors' ads that are placed with a higher bid. Want to understand the concept in depth? Check out the following explanation!

What Is Quality Score in Google Ads?

Quality score in Google Ads is a metric that describes how good the quality of your ad is compared to other advertisers. This quality can relate to the relevance of the ad or its usefulness to the target audience.

The quality score is given on a scale from 1 to 10. The higher the number, the better the ad quality. Generally, a high quality score is in the range of 7 to 10.

If the quality score is high, the ad has a strong potential to be displayed more often, receive more clicks, and achieve more optimal results at a relatively low cost.

Why Is Quality Score Important in Google Ads?

In general, Quality Score is important because it contributes to the efficiency of ads in Google Ads. If explored further, here are its full contributions:

1. Influences Ad Rank

Essentially, ad rank is not only influenced by the bid value but also by the Google Ads quality score. In fact, Google can place your ad in a top position even if the bid is not very high, as long as the quality score is good.

In certain conditions, an ad's rank can also surpass other ads with higher bids but lower quality scores. This can happen because your ad is considered more relevant and useful to the audience.

With a high ranking, ads have the opportunity to get better visibility and higher CTR. 

2. Lowering Cost per Click (CPC)

Google calculates ad costs with the following approach:

This means that if the quality score increases, the value of the divisor becomes larger. As a result, the CPC you pay becomes lower.

So, it can be said that Google gives a “reward” to ads that have a high quality score by setting a lower ad distribution cost than its competitors.

3. Increasing Return on Investment (ROI)

Return on Investment (ROI) indicates how much result is obtained compared to the costs incurred.

In Google Ads, when an ad has a high ad rank, the ad tends to appear in a more strategic position. If at the same time the CPC is low, the ad has the potential to get more clicks at a more efficient cost.

Furthermore, if the ad is relevant to the user's needs, the incoming clicks tend to be of high quality. This means that users have a greater chance of taking real actions such as signing up for a service or purchasing a product.

With lower costs but higher clicks and conversions, the value obtained becomes greater compared to the costs incurred. This is where the evidence shows that a high-quality score drives increased ad ROI.

Read also: 4 PPC Bidding Strategies to Maximize ROI, Check Them Out!

Determinant Factors of Quality Score

Quality score itself is formed from three factors, namely expected CTR, ad relevance, and landing page experience.

The following is the Google Ads quality score formula that can be used to calculate the quality score of a keyword visible on the dashboard, along with an explanation of each factor:

The explanation of each determinant factor of the quality score is as follows:

1. Expected Click-Through Rate (CTR)

Expected CTR is an estimate of how likely users are to click on your ad. To determine it, Google looks at historical data such as the performance of similar keywords and ads.

If the system predicts that your ad is likely to receive many clicks because it is attractive and relevant, its expected CTR will be higher and contribute to improving the Quality Score.

2. Ad Relevance

Ad relevance is a factor that measures how well the content of an ad matches what the user is searching for. To improve it, the displayed ad must correspond to the targeted keywords and be able to meet the user's needs.

If the displayed ad is relevant to the user's search, it means the ad relevance factor is fulfilled and contributes positively to the increase of the quality score.

3. Landing Page Experience

Landing page experience is a factor that evaluates the quality of the page after the ad is clicked. This factor includes page quality (loading speed, ease of navigation, mobile-friendliness), relevance of the page content to the ad, and the usefulness of the content.

If the user has a positive experience after clicking the ad, the score for this factor will be high and also contribute positively to the Google Ads Quality Score.

Common Mistakes That Can Potentially Lower Google Ads Quality Score

Unknowingly, some advertisers sometimes engage in practices that can lower Google Ads quality score, including:

• Combining many different contextual keywords in one ad group: This can make the ad message too general, whereas one ad cannot be relevant for all keywords. For example, an ad group containing the keywords "backpack," "shoulder bag," and "women's wallet."
• Using keywords that are too general: Such keywords may bring in many clicks, but from people who do not really need them. For example, the keyword "wallet" can appear for people searching for coin wallets, long wallets, leather wallets, and branded wallets.
• Not optimizing the quality of the landing page: A slow landing page, one that looks uncomfortable to view or fails to display relevant content, is at risk of being immediately abandoned by users. This creates a poor experience, which can potentially lower the Google Ads quality score.
• Ad text not matching the keywords users search for: For example, a user searches for the keyword “laptop service”, but the ad that appears says “Network Device Rental Services”. This shows that the ad does not meet relevance aspects, and its CTR may be low.
• Not monitoring ad performance and periodic optimization: This causes advertisers to be unaware of poor-performing keywords, not optimize ads with low CTR, and not improve the landing page. As a result, the Quality Score can drop without realization.

Read also: Full Guide to Google Ads Performance Max for Beginners!

How to Improve Google Ads Quality Score

You can do several of the following ways to improve your Google Ads quality score:

1. Run A/B Testing

A/B testing is the process of comparing two ad versions to see which ad performs better, either in terms of CTR or its success in driving conversions.

A/B testing can be done by creating several ad versions, for example, by differentiating the headline, description, or CTA. Next, you need to set up traffic distribution, for example, 50% to version A and 50% to version B.

2. Update Ads Regularly

In fact, marketing language, user needs, and market trends are constantly changing. Therefore, you must regularly update your ads so they don't become "outdated" and cause ad fatigue.

An example of updating an ad is changing the text "50% Off Earphones" to "Wireless TWS Earphone Promo 2026 – Up to 50% Off + Free Protective Case."

3. Use Ad Extensions

Ad extensions are a feature in Google Ads that allow advertisers to add information beyond the main ad text.

Ad extensions help increase ad visibility and encourage user interaction, which in turn contributes to a higher CTR as one of the determining factors of quality score. Some examples of extensions are sitelink, call extension, and structured snippet.

4. Add Negative Keywords

Negative keywords in Google Ads are words or phrases added to prevent ads from appearing in irrelevant searches.

For example, if you sell premium home decor, negative keywords that can be added include "cheap," "free," and “KW.”

In addition to positively impacting Quality Score, adding negative keywords also increases conversion opportunities and helps maintain brand image.

Ultimately, to optimize the quality score in Google Ads, you need continuous optimization in various aspects. If all aspects are aligned, users are likely to be satisfied, and Google considers your ads to be of high quality.

Google Ads Quality Score is one of the technical components in SEM (Search Engine Marketing).

Generally, there are several challenges commonly faced by advertisers when running SEM, including limited tools and obstacles in carrying out continuous optimization.

However, this can be prevented by choosing cmlabs as your partner. SEM Service by cmlabs are the right solution to execute a profitable SEM strategy in the following ways:

• Full-funnel optimization: SEM does not stand alone. We align landing pages, copy, and design, and track conversions to ensure every funnel works optimally.
• Data-driven bidding strategy: We do not rely on Google's suggestions. Every decision is based on data and the experience of our expert team in monitoring intent, behavior, and profitability.
• Personalized according to business goals: Our SEM strategies are specifically designed based on your funnel, products, margins, seasonal factors, and business conversion patterns.
• Clear ROI visibility for the management team: We ensure that CAC, ROAS, conversion value, and profitability are easy to understand to support every business decision.  

Want to discuss with the cmlabs team to find the advertising approach that best suits your business? Contact our marketing team now!

Read also: SEO and SEM Basic Guidelines And Which One You Should Use