Quality Score is Google’s 1–10 rating of how relevant your ad is to the user. It directly affects your ad rank and your cost per click.
The practical consequence: an advertiser with a high score can bid less than a lower-scoring competitor and still appear above them.
Three components
1. Expected click-through rate
Based on your ad’s historical performance. It carries the most weight. To improve it:
- Put the keyword verbatim in the ad copy
- Give concrete information: price, offer, delivery
- Use every extension: sitelinks, callouts, structured snippets
- Test at least three ad variants per ad group
2. Ad relevance
The match between keyword and ad copy. The most common mistake: stuffing fifty keywords into one ad group with a single ad. The fix is tightly themed groups — 5–15 closely related terms per group.
3. Landing page experience
The most neglected component. What gets assessed:
- How well page content matches the query
- Load speed, especially on mobile
- Ease of navigation and transparency
- Whether the information sought is genuinely on the page
An ad for "air conditioning service" must land on the air conditioning service page, not the homepage. That single change lifts scores by one or two points in most accounts.
How to monitor it
In the keywords view, enable the Quality Score column and the three component columns. Each shows as "above average", "average" or "below average". Focus on the below-average ones first.
Realistic expectations
Moving a score from 7 to 9 is hard and the return is limited. The real win is lifting 3s and 4s to 6s and 7s; cost drops sharply across that range.
Also note the score is calculated in real time per search term. The number in the interface is a historical average, not the live truth. Read it as a trend, not an absolute.
The link to SEO
The landing page experience component benefits directly from SEO work. Fast, well-structured pages that match the query improve organic rankings and ad costs at the same time. It is the most concrete intersection of the two disciplines.