John Mueller from Google clarified that updating the lastmod date in XML Sitemaps to today’s date is ineffective for SEO. Such manipulation, often seen as a quick hack, does not yield long-term benefits and can actually harm a site's credibility with search engines. Google emphasizes that only substantial content changes warrant a lastmod date modification, cautioning against trivial updates. Overuse of this tactic can lead to mistrust from Google. Historical context shows that these strategies were once more common but are now viewed as outdated and ineffective.
Changing the lastmod date in XML Sitemaps to today's date won't improve your rankings—it’s just lazy and not beneficial for SEO.
SEO hacks may yield temporary results, but they lack long-term benefits; significant content changes should dictate the lastmod date instead.
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