The Belgian market for natural referencing is undergoing an accelerated transformation since the activation of Google’s AI Overviews in March 2025. The question is no longer just about positioning a site in the top ten results, but about understanding where organic visibility is truly shifting, and what this changes in the choice of an SEO provider.
Classic SEO Score vs. AI Visibility: The Gap That Summarizes the Belgian Problem
Analyses conducted in 2026 on 200 Belgian sites reveal a clear discrepancy between two metrics. The median classic SEO score reaches 70, compared to 35 for AI visibility (GEO). Even more striking: 97.5% of these sites have a GEO score lower than their SEO score.
| Metric | Median (200 Belgian sites, 2026) |
|---|---|
| Classic SEO Score | 70 |
| GEO Score (AI Visibility) | 35 |
| Sites with GEO lower than SEO | 97.5% |
None of these 200 sites had the four basic structured signals correctly implemented (structured data, schemas, semantic markup). This massive lag explains why a technically correct site according to 2023 criteria can lose organic clicks without changing its position in the SERPs.
Engaging an SEO expert in Belgium who integrates this dual reading (traditional SEO and optimization for generative responses) becomes a concrete selection criterion, not just a sales argument.
AI Overviews in Belgium: Measured Loss of Organic Clicks by Regulators
Since March 26, 2025, Google’s AI-generated summaries have been active in the Belgian market. The French regulator Arcom estimates the traffic loss attributable to AI summaries between 33% and 38% in the affected European markets, including Belgium.
This figure mainly concerns informational queries, where Google directly provides a synthetic answer at the top of the page. For an e-commerce site or service provider, this means that certain pages that generated qualified traffic two years ago now receive only a fraction of the visits.
An SEO consultant who does not measure the impact of AI Overviews on their client’s keyword portfolio is working with an incomplete map. The distinguishing skill today is the ability to audit visibility in AI responses and adapt the content strategy to appear as a cited source.
GEO and SEO in Belgium: What Generative Optimization Changes Practically
The term GEO (Generative Engine Optimization) refers to the set of practices aimed at making content citable by generative search engines. It is not a replacement for classic SEO, but an additional layer that requires specific technical skills.
Here are the structured signals that most Belgian sites do not implement correctly:
- Schema.org structured data tailored to the type of content (FAQ, product, article, local service), which allows AIs to parse information unambiguously
- Semantic markup of entities (author, organization, location) to enhance perceived credibility by generative algorithms
- Structuring responses within the content itself, with paragraphs designed to be extractable as direct quotes
A site well-positioned in classic SEO but invisible in AI responses is gradually losing ground to competitors who combine both approaches. The gap between the two scores observed in the Belgian market shows that this transition has not yet been initiated by the majority of companies.
Multilingualism and Local SEO in Belgium
Belgium imposes an additional constraint that the French or Dutch markets do not have to the same degree. Managing three linguistic communities in an SEO strategy requires a site architecture thought out from the start: correctly deployed hreflang, localized content (not just translated), and Google Business Profile configured by language area.
A provider who offers a uniform SEO strategy for Brussels, Antwerp, and Liège ignores the market reality. Search volumes, competition for keywords, and purchasing behaviors vary significantly from one region to another. This local granularity represents a differentiation lever for Belgian SMEs targeting a specific geographic area.
Choosing an SEO Consultant in Belgium: Technical Criteria to Check
Selecting an SEO provider should not rely on positioning promises, but on verifiable skills. A few concrete points can distinguish an up-to-date consultant from a provider applying outdated recipes:
- Does their audit methodology include an analysis of visibility in AI Overviews, or is it limited to classic SERP positions?
- Do they master the deployment of Schema.org structured data beyond basic markup?
- Do they offer a differentiated strategy by language and region, with localized content rather than automatic translations?
- Can they show measured results on GEO (citation rate in AI responses) and not just on overall organic traffic?
The ability to simultaneously audit classic SEO and generative visibility is the most reliable technical marker for evaluating a natural referencing expert in the current Belgian market.
The documented gap between SEO scores and GEO scores on Belgian sites shows that the window of opportunity remains open. Companies that integrate this dual optimization now gain a measurable advantage over competitors still focused solely on traditional positioning criteria.
