An XML sitemap acts as a structured inventory of the URLs you want to be crawled by search engines. For Belgian sites, often multilingual and consisting of hundreds of pages spread across French, Dutch, and sometimes German versions, this inventory becomes a technical management tool. Measuring its actual impact on crawling and indexing helps to understand why some pages remain invisible on Google despite well-crafted content.
XML Sitemap Tags: Which Ones Does Google Really Use
Not all tags in a sitemap are created equal. Google Search Central, in its documentation updated on July 8, 2026, specifies which elements are actually taken into account by its crawlers.
| Tag | Considered by Google | Practical Use |
|---|---|---|
| loc (URL) | Yes | Indicates the address of the page to be crawled |
| lastmod | Yes, if reliable | Signals a real editorial change in the content |
| changefreq | No | Ignored by Google |
| priority | No | Ignored by Google |
This table shows a clear gap between common perception and technical reality. Many Belgian site managers meticulously configure the values of changefreq and priority with no effect on crawling. The time spent on these tags is wasted.
The lastmod tag is the only temporal signal utilized by Google, provided that the date corresponds to a verifiable change in content, structured data, or links. A date artificially modified during a simple technical redeployment, without editorial change, renders the signal unreliable.
To see how this principle translates into an operational sitemap, the sitemap of Belgium Référencement illustrates a structure where each listed URL corresponds to distinct and dated content.
Sitemaps and Belgian Multilingual Sites: The Trap of Automated lastmod
Belgian sites have a structural peculiarity: multiple language versions often share the same technical infrastructure. An e-commerce site based in Brussels may offer three trees (/fr/, /nl/, /de/) deployed simultaneously.
During a production deployment, even minor ones (bug fixes, module updates), content management systems frequently regenerate the sitemap by updating all lastmod dates. The result: dozens or hundreds of URLs appear as modified even though their content has not changed.
This phenomenon, documented by Site Watcher and SquirrelScan, has a technical name: lastmod churn. Its consequences are measurable:
- Google’s crawlers learn to ignore the lastmod signal of the affected site, as it no longer reflects real changes
- Pages that are actually updated (new product sheet, updated article) lose their freshness advantage
- On a trilingual site, a single production deployment can distort the signal for three times more URLs than a monolingual site
The solution involves editorial control of the lastmod tag. Only pages whose visible content has changed should have their date updated in the sitemap.
URL Discovery by Google: What a Sitemap Solves and What It Does Not
Google presents the sitemap as a discovery tool, not as a guarantee of indexing. This distinction is crucial for Belgian companies investing in organic search.
A sitemap helps crawlers find URLs in three specific situations:
- Recently launched sites that do not yet have incoming links pointing to their pages
- Large sites where some deep pages receive few or no internal links
- Orphan pages, accessible only via an internal search engine or a dynamic filter
However, submitting a URL in a sitemap does not force Google to crawl or index it. If a page has too thin content, a noindex signal, or is blocked by the robots.txt file, its presence in the sitemap will change nothing.
For the Belgian market, where competition for local queries (searches including a city or region) is intensifying, the sitemap acts as a complement to internal linking. It does not replace a coherent link architecture between pages.
XML Sitemap and Internal Linking: Two Complementary Levers for SEO in Belgium
A site with properly connected internal navigation between all pages needs the sitemap less for discovery. Google naturally follows internal links during its crawling. The sitemap is most valuable when the linking presents gaps.
On multilingual Belgian sites, these gaps often appear between language versions. A page /fr/service-comptabilite/ may be well linked in the French structure but completely disconnected from its /nl/boekhoudservice/ equivalent. The sitemap then allows signaling both URLs to crawlers, even in the absence of a direct link between them.
The sitemap does not compensate for a failing internal linking structure in the long term. It offers a temporary safety net. Sites that achieve the best results in organic search combine a clean sitemap (reliable lastmod dates, no blocked or erroneous URLs) with an internal link architecture designed for each language.
Checking the Status of Your Sitemap in Google Search Console
Google Search Console displays the number of URLs submitted via the sitemap and the number of URLs actually indexed. A significant gap between these two figures indicates a technical problem: 404 error pages, chain redirects, duplicated content between language versions, or forgotten noindex tags.
Regularly monitoring this gap provides a direct measure of the sitemap’s effectiveness. For a Belgian site publishing content in multiple languages, this check should follow each production deployment to detect any potential lastmod churn before it undermines the crawlers’ trust in the sitemap dates.
The XML sitemap remains a diagnostic tool as much as a submission tool. Its value depends less on its mere existence than on the rigor with which it reflects the actual state of the published content.
