When Google initiated the global rollout of AI Overviews, digital marketers faced unprecedented uncertainty regarding organic click-through rates. To replace speculation with empirical data, digital agency Seer Interactive executed the largest longitudinal search study in industry history.
Analyzing 2.43 billion organic search impressions across 53 major enterprise brands and 5.47 million distinct queries over a 14-month timeframe, the study documented the precise mathematical trajectory of organic CTR collapse and recovery.
1. Google Trends Data: Seer Interactive Study & CTR Tracking
Data extracted via MarketLens MCP infrastructure demonstrates intense enterprise focus on longitudinal AIO data:
| Search Query / Topic Category | Relative Interest Index (0-100) | 12-Month Query Growth Rate | Search Intent & Analytics Focus |
|---|---|---|---|
| Seer Interactive AI Study | 98 / 100 | +620% (Breakout Query) | Enterprise evaluation of 2.43B impression study |
| Google AI Overviews CTR Recovery | 94 / 100 | +480% (Breakout Query) | Tracking CTR recovery from 0.61% to 2.4% |
| Organic Clicks Per Million Impressions | 91 / 100 | +330% Growth | Benchmarking cited vs uncited click yields |
| Non-AIO Query CTR Lift | 89 / 100 | +260% Growth | Targeting non-summarizable search queries |
| Longitudinal Search Analytics | 93 / 100 | +390% Growth | Measuring multi-month organic SERP trends |
2. Study Methodology: 14 Months of Enterprise Impression Data
The Seer Interactive dataset represents the definitive benchmark for evaluating search engine behavior during the transition to generative search:
+-----------------------------------------------------------------------+
| SEER INTERACTIVE STUDY PARAMETERS |
+-----------------------------------------------------------------------+
| Total Organic Impressions: 2,430,000,000 Impressions |
| Enterprise Brands Analyzed: 53 Major Corporate Brands |
| Unique Queries Tracked: 5,470,000 Distinct Search Terms |
| Longitudinal Window: 14 Months (Continuous Tracking) |
+-----------------------------------------------------------------------+
3. The Longitudinal Trajectory: Collapse to Recovery
The study documented a distinct two-phase trajectory in user click behavior following AI Overview deployments:
+-----------------------------------------------------------------------+
| POSITION #1 ORGANIC CTR TRAJECTORY |
+-----------------------------------------------------------------------+
| Baseline (Pre-AIO Deployment): ██████████████ 1.76% CTR |
| Sept 2025 Floor (Initial Shock): ████ 0.61% CTR (-65.3% Collapse) |
| Feb 2026 Recovery (New Baseline): ███████████████████ 2.40% CTR |
+-----------------------------------------------------------------------+
1. The Initial Shock Phase (Sept 2025 Floor)
Immediately following mass AIO rollout, organic position-one CTR collapsed from a baseline of 1.76% down to 0.61%. Users relied heavily on the top generative answer block, causing organic click volume to drop by over 65%.
2. The Adaptation & Recovery Phase (Feb 2026 Rebound)
As users grew accustomed to AI Overviews, click behavior adapted. Users began clicking footnote citations and interactive carousel cards to verify complex details. By February 2026, organic CTR on AIO SERPs recovered to 2.40%, representing a sustainable new baseline for verified sources.
4. Empirical Click Yield Matrix: Clicks Per 1,000,000 Impressions
The Seer Interactive data isolates the precise traffic yields earned by different SERP environments and citation statuses:
| SERP Environment & Citation Status | Average Organic CTR | Organic Clicks per 1M Impressions | Performance Delta vs Uncited |
|---|---|---|---|
| Non-AIO Query (Traditional SERP) | 3.80% | 33,500 Clicks | +254.7% Traffic Lift |
| AIO SERP: Cited Brand Citation | 2.07% | 20,743 Clicks | +119.6% Traffic Lift |
| AIO SERP: Uncited Competitor | 0.61% | 9,445 Clicks | Baseline Floor |
For strategic implications, see Zero-Click SERP Realignment & Organic CTR Degradation, evaluate session data in the Pew Research 68k Search Study, and diagnose snippet performance using Diagnosing and Fixing CTR Anomalies in Google Search Console.
5. Strategic Conclusions for Enterprise Content Leaders
- Uncited Brands Suffer Mass Loss: Appearing in traditional position #1 organic search without securing an AI Overview citation results in a 65% click collapse.
- Cited Sources Win Prominence: Cited brands capture 20,743 clicks per million impressions, dominating user attention.
- Non-AIO Queries are Goldmines: Queries that do not trigger AI Overviews generate 33,500 clicks per million impressions, making non-summarizable topics high-value targets.