How Ad Relevance Score Works
Ad Relevance is one of three components that make up Quality Score in Google Ads, alongside Expected CTR and Landing Page Experience. It measures whether your ad content is relevant to the queries triggering it within a given ad group. Google rates it on a three-point scale: "Above Average" (your ad is as relevant or more relevant than most ads in the same auction), "Average" (typical relevance for the auction), and "Below Average" (your ad is notably less relevant than competitors'). A "Below Average" Ad Relevance score is a signal that your ad copy doesn't closely match the keywords in your ad group — either because the ad group covers too many disparate themes, or because the headlines don't incorporate the keyword language searchers are using.
Why Ad Relevance Score Matters for B2B Marketing
For B2B advertisers, Ad Relevance is a direct lever on campaign economics. Quality Score (1-10, calculated from all three components) determines Ad Rank in conjunction with bid — a higher Quality Score means you pay less for the same position. Ads with "Below Average" relevance require higher bids to achieve the same position as more relevant competitors, increasing your effective CPC. Conversely, improving Ad Relevance from Below Average to Above Average can reduce CPC by 30-50% for the same ad position according to Google's published Quality Score impact data.
Ad Relevance Score: Best Practices & Strategic Application
Improving Ad Relevance in B2B campaigns: practice Single Keyword Ad Groups (SKAGs) or tight thematic ad groups (TSAs) to ensure every keyword in an ad group shares a common theme that your RSA headlines can directly address; include the primary keyword in at least 3-4 RSA headlines to signal direct relevance to the search query; use Dynamic Keyword Insertion (DKI) sparingly for exact match ad groups where you want Google to insert the exact search term into a headline; audit ad groups flagged as "Below Average" and split them into more tightly themed groups; and ensure RSA headline variety covers multiple aspects of the keyword theme rather than repeating the same keyword phrasing.
Agency Perspective: Ad Relevance Score in Practice
At MV3, Ad Relevance diagnostics are part of our monthly Quality Score audit. When we see Below Average ratings in B2B accounts, the most common causes are ad groups that were built around broad keyword themes rather than tight intent clusters — for example, an ad group containing "CRM software," "CRM platform," "CRM system," "customer relationship management," and "sales CRM" all competing for the same RSA headlines. Splitting these into 2-3 tighter groups with focused headlines consistently lifts Ad Relevance ratings and reduces CPC within 2-4 weeks.
