Official statement
The lastmod tag in the XML sitemap should primarily be updated when there are changes to the main content or the structure of the site, not for simple changes in common template elements (menu, footer). There is no strict rule, but the objective is to signal to Google significant content updates.
2:56
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Official statement from
(4 years ago)
⚠ A more recent statement exists on this topic
Should You Really Update the lastmod Tag in Your XML Sitemap?
View statement →
TL;DR
Google states that the lastmod attribute of XML sitemaps should be updated for changes to main content, not for minor updates. The goal is to indicate significant updates to the site.
❓ Frequently Asked Questions
Qu'est-ce qui est considéré comme un changement significatif ?
Un changement dans le contenu principal ou la structure ayant un impact sur l'expérience utilisateur.
Pourquoi ne pas mettre à jour lastmod pour chaque modification ?
Cela pourrait surcharger Google de signaux non pertinents et réduire l'efficacité du crawl.
Est-ce que l'importance de lastmod est prouvée ?
Google indique son importance pour signaler les mises à jour clés, mais la clarté manque pour certaines situations.
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