What This Benchmark Measures
Google AI Overviews now appear on a substantial share of commercial-intent queries, but the trigger rate, citation rate, and click-through cannibalisation vary sharply by industry. This benchmark reports three metrics across 14 industries in 2026: AIO trigger rate (percentage of monitored category queries that show an AIO), citation concentration (number of distinct domains the average AIO cites), and CTR cannibalisation (relative organic CTR change when an AIO is present versus absent).
Industry Benchmark Table
| Industry | AIO Trigger Rate | Avg. Cited Domains | Estimated CTR Cannibalisation |
|---|---|---|---|
| Healthcare | 78% | 5.4 | -46% |
| Personal finance | 71% | 4.8 | -41% |
| Education / EdTech | 64% | 4.2 | -37% |
| Travel / hospitality | 62% | 5.1 | -39% |
| Home improvement | 59% | 4.0 | -34% |
| Automotive | 56% | 3.9 | -31% |
| SaaS / B2B software | 52% | 4.6 | -29% |
| Fintech | 49% | 4.3 | -32% |
| Insurance | 47% | 4.1 | -33% |
| E-commerce | 44% | 4.4 | -27% |
| Legal | 42% | 3.8 | -30% |
| Cybersecurity | 38% | 4.0 | -26% |
| Real estate | 34% | 3.6 | -22% |
| HR / recruiting | 31% | 3.5 | -21% |
Three Findings
Trigger rate is heavily concentrated in regulated and consumer-research verticals. Healthcare, personal finance, and education see AIO on more than three out of every five commercial queries. The pattern reflects Google's product strategy of using AIO to compress information-heavy buyer journeys.
Citation concentration varies less than trigger rate. Across all 14 industries, the average AIO cites between 3.5 and 5.4 domains. The narrower spread suggests that AIO synthesis is structurally similar across verticals; what changes is how often it triggers, not how many sources it pulls when it does.
CTR cannibalisation tracks trigger rate but not perfectly. Healthcare combines high trigger rate with high cannibalisation (-46 percent), making it the most disrupted vertical. Real estate has lower trigger rate but proportionally lower cannibalisation, suggesting users still click through for property-specific information.
Vertical-Specific Optimisation Patterns
Across the 14 industries, three optimisation patterns explain why some brands consistently win AIO citations within their vertical.
Healthcare and personal finance: AIO leans on .gov, .edu, and tier-1 medical / financial publications heavily. Brand-direct content rarely wins citation slots. The optimisation lever is tier-1 earned media plus rigorous E-E-A-T signals (named expert authors, credential pages, editorial policy disclosure).
SaaS / B2B software: AIO citations skew toward G2, Capterra, vendor-comparison editorial, and the brand's own documentation. The leverage point is comparison-content depth and Schema.org Product / SoftwareApplication coverage.
Travel / hospitality: AIO blends OTA aggregator data with destination-publication editorial. Brand-direct content competes for citation when paired with structured itinerary content and rich Schema markup (TouristAttraction, Hotel, TravelAction).
Brand Visibility Implications
Three implications for brand teams. First, AIO trigger rate is the right operational metric for prioritisation; high trigger industries demand earlier and more aggressive AIO optimisation than low-trigger industries. Second, citation concentration is uniform enough that the citation-winning playbook (passage structure, Schema.org, freshness) is broadly portable across verticals. Third, CTR cannibalisation is real and often understated; brands must measure net traffic effect rather than just citation gains, because winning the citation while losing the click is a worse outcome than not appearing in AIO at all.
Methodology
Findings are based on Presenc AI continuous monitoring of approximately 11,800 commercial-intent queries across 14 industries during Q1 2026. Trigger rate is measured as the percentage of monitored queries showing an AIO at sample time; citation concentration is the mean count of distinct cited domains per AIO; CTR cannibalisation is estimated by comparing organic-position CTR for monitored queries with and without AIO present, using triangulated GSC click data from participating brands. Updated quarterly. Last update: April 2026.
How Presenc AI Helps
Presenc AI tracks AI Overview presence, citation status, and citation composition for every monitored query and ties each to organic GSC click data so the cannibalisation effect is observable at the query level. For brands in healthcare, finance, education, and travel where AIO triggers most aggressively, the Presenc AIO module surfaces which AIOs help, which hurt, and which competitor pages are eating your citation slots.