On March 17, 2026, SISTRIX published an analysis of more than 100 million German keywords showing that Google's AI Overviews cut the click-through rate at position 1 from 27% to 11% — a 59% drop — according to data released by founder Johannes Beus on the official SISTRIX blog.
The finding confirms, at unprecedented scale, a pattern already documented in the US by Pew Research (-47%) and GrowthSRC (-32%). But SISTRIX's methodology — the largest keyword dataset analyzed to date — gives these numbers particular weight.
What the data shows in detail
Without an AI Overview, a page ranking at position 1 earns a 27% click-through rate. When an AIO is present, that falls to 11%. Across all organic positions, the share of searches resulting in a click drops from 57% (without AIO) to 33% (with AIO).
79% of German AI Overviews appear above the organic results. The remaining 21% appear further down the page, after the first few organic listings — a downward push effect that erodes traffic even for well-ranked content.
SISTRIX also notes progression: AIO prevalence in German results was 17% in August 2025. It now stands at 20%. Growth has slowed, but the feature's presence continues to expand.
Who loses the most — and why
The impact varies significantly by category. Parenting and health sites take the heaviest hits:
| Sector | Estimated click loss |
|---|---|
| Parenting / baby | -24%+ |
| Health | Above average |
| Home improvement | Above average |
| News and media | -7.4% |
| Recipes (e.g. Chefkoch) | -1% |
| E-commerce / booking | Near zero |
In absolute volume, Wikipedia leads with an estimated 31.6 million clicks lost per month in Germany — about 5% of its Google traffic in that market. Specialist health portals like lumedis.de lose up to 30% of their total organic traffic.
The logic is clear: informational queries (how to do X, what is Y) are the first casualties. Transactional queries — where users need to act (buy, book, compare) — are largely spared.
What this means for businesses
The study covers Germany, but the mechanics are identical across all markets where Google is deploying AI Overviews. Here's what changes now:
- An informational site in health or education can see its search traffic cut in half without losing a single ranking position. The problem is no longer ranking — it's that nobody clicks.
- Search volume analysis alone is now insufficient. A keyword with 10,000 monthly searches but 80% AI Overview coverage is worth less than a 2,000-search keyword with no AIO.
- Transactional and timely content holds up. If your content responds to a purchase intent or covers a recent event, you're protected — for now.
Concrete action: Audit your top 20 keywords using a tool that detects AI Overview presence (SE Ranking, SISTRIX, Semrush). If more than half trigger an AIO, your content strategy needs to evolve — toward more transactional content, proprietary data, or sector-specific news coverage.
Our take
A 59% CTR drop at position 1 is no longer a warning signal — it's a structural market shift. What SISTRIX confirms with 100 million keywords is that Google visibility can no longer be measured in rankings alone. It must account for actual clicks after deducting AIO impact. SEO teams that haven't integrated this factor into their reporting are working with vanity metrics.
Further reading:
Growth and SEO content strategist, I founded Cicéro to help businesses build lasting organic visibility — on Google and in AI-generated answers alike. Every piece of content we produce is designed to convert, not just to exist.
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