Definition
The Visibility Index is a proprietary metric developed by Sistrix, a German SEO tool that has become a European reference. It measures a domain's overall visibility in Google search results by analyzing positions across a panel of one million representative keywords. The score is calculated by weighting each position by keyword search volume and average CTR for that position. The main benefit is rapidly detecting Google update impacts (core updates) and comparing visibility trajectories of competitors over time.
Key Points
- Global visibility index based on a panel of one million keywords
- Reference for detecting Google update impacts (core updates)
- Widely used competitive benchmarking tool in Europe
Practical Examples
Algorithmic penalty detection
A site's Visibility Index drops from 12.5 to 3.2 in one week. The date matches exactly with a Google core update, confirming a negative algorithmic impact.
Industry benchmark
Analyzing the Visibility Index of 5 main link building players in France shows scores of 0.8 to 4.5, defining the competitive landscape for LemmiLink.
Frequently Asked Questions
Sistrix is recognized as one of the most reliable references in Europe for measuring SEO visibility. Its keyword panel is large and representative.
The Visibility Index is an estimate based on positions and keyword search volumes. Organic traffic (measured by Analytics) is the actual number of visitors. The Visibility Index is a predictive indicator; traffic is a real measurement.
Go Further with LemmiLink
Discover how LemmiLink can help you put these SEO concepts into practice.
Last updated: 2026-02-07