Quality Score is the single most important number in a Google Ads account that most advertisers don’t fully understand. It is a 1–10 score that Google assigns to each keyword, and it has a disproportionate impact on both where your ads appear and what you pay for each click. Improving Quality Score from 5 to 8 on a competitive keyword can reduce your cost per click by 30–40% while simultaneously moving your ad into better positions. That is a material return on the attention it deserves.
The three components and what they actually measure
Quality Score is composed of three factors: Expected Click-Through Rate (how likely Google predicts your ad will be clicked for a given query relative to other ads), Ad Relevance (how closely your ad copy matches the intent of the search query), and Landing Page Experience (how relevant, useful, and easy to use Google considers the page users land on after clicking).
Each is rated as ‘Above Average’, ‘Average’, or ‘Below Average’ relative to other advertisers targeting the same keyword. The overall Quality Score is a 1–10 number that combines all three, with the actual calculation weighted by Google in ways that are not publicly disclosed but where Landing Page Experience tends to be the most impactful lever for accounts with poor scores in that category.
Why Quality Score matters financially
Ad Rank — the formula that determines your ad position and actual cost per click — includes your Quality Score as a multiplier on your bid. An advertiser with a Quality Score of 8 bidding £2.00 has a higher Ad Rank than an advertiser with a Quality Score of 4 bidding £3.00. The higher-Quality-Score advertiser gets a better position at a lower effective cost.
This is Google’s mechanism for rewarding relevance: advertisers who show users the most relevant ads at the most relevant destinations get competitive advantages over advertisers who bid on keywords without the corresponding relevance. It is genuinely meritocratic in that sense, and it means that improving your Quality Score on competitive keywords can deliver returns that significant bid increases cannot.
Improving Expected Click-Through Rate
Expected CTR is calculated relative to other advertisers bidding on the same keyword. Improving it means writing ad copy that more effectively compels searchers to click your ad rather than competitors’. This involves matching your headline and description to the specific intent behind the query (not just the keyword), using numbers and specificity (prices, delivery times, specific outcomes) over vague claims, testing multiple ad variants systematically, and using ad extensions — sitelinks, callouts, structured snippets — that increase the visual footprint and relevance of your ads.
Improving Ad Relevance
Ad Relevance improves when the keyword, the ad copy, and the search intent are tightly aligned. The most reliable structural approach is tight ad groups — grouping keywords by close semantic similarity and writing ad copy specifically for each group. An ad group containing fifty loosely related keywords will have weaker ad relevance scores than one containing five tightly grouped keywords with dedicated ad copy.
Improving Landing Page Experience
Landing Page Experience is assessed by Google based on the relevance of your landing page to the query and ad, the usefulness and quality of the content, the ease of navigation, and page loading speed. The most common issue is directing all ad traffic to a homepage or generic service page rather than a specifically relevant landing page that continues the journey the ad started.
If your ad targets ‘cloud migration services for financial services’, the landing page should be about cloud migration for financial services — not your general cloud services page. The relevance gap between ad and landing page is the most common source of ‘Below Average’ landing page experience scores.
ThynkrSystems conducts Quality Score audits as part of new PPC engagements, identifying the specific accounts, campaigns, and keywords where the biggest cost-reduction opportunities sit. Improving Quality Score before increasing bids is almost always the more efficient path to better results.
