Developing
Mueller's remarks, from a podcast episode. The video's chapter label and the conversation differ on whether lastmod is deprecated.
In 60 seconds
- Mueller gave two reasons a valid, reachable sitemap can show "couldn't fetch": host load and crawl demand.
- He said crawl demand is "very often based on the perceived quality of a website", so a low-quality site's sitemap may be skipped for now.
- Priority and change frequency are no longer useful; Google uses lastmod when it is reasonable and ignores it when it is unreliable, with no spam penalty.
- Smaller sites probably don't need a sitemap; e-commerce sites benefit most. Sitemaps should list canonical URLs without tracking parameters.
Impact Layer
- What changed
- Google has explained a long-standing Search Console error message in plain language.
- Why it matters
- A "couldn't fetch" status on a healthy file can be a signal about site quality or capacity, not a technical bug.
- Who is affected
- SEO leads and developers who manage sitemaps.
- Martech stack area
- SEO & Search, CMS
- Stack impact
- Before debugging the file, check server load and site quality signals. Keep lastmod accurate and list only canonical URLs.
- Business impact
- Low Podcast remarks, not documentation. Mueller said he would need to check the sitemap size limits (50,000 URLs, 50 MB uncompressed), and the episode's chapter marker labels lastmod as deprecated while the discussion treats it as case by case.
- Related technologies
- Related vendors
- What to watch
- Updates to Google's sitemap documentation.
Episode 114 of Google’s Search Off the Record, “Do sitemaps still matter?”, was published on October 1, 2026, with John Mueller and Martin Splitt. PPC Land summarised it, including the transcript Google published.
Why a valid sitemap says “couldn’t fetch”
- Host load: Google may lack time to crawl the file because its systems are busy.
- Crawl demand: Google may see little need to crawl more from the site, which Mueller said is “very often based on the perceived quality of a website”. If Google rates a site’s quality poorly, it may skip the sitemap for now and return if quality improves.
Fields and practice
- Priority is no longer useful, since nearly every URL was marked maximum; change frequency is not useful either.
- Lastmod: Google wants to use it, uses reasonable dates and ignores unreliable ones, with no spam penalty.
- Smaller sites probably don’t need a sitemap, though there is “no harm”. E-commerce sites benefit most. Large news sites should use the news sitemap format.
- List canonical URLs without tracking parameters or date stamps. An RSS feed can act as a short-form sitemap.
Our read
If a healthy file keeps failing, look at site quality and server capacity before you rebuild it. These are spoken remarks, so confirm limits against Google’s documentation.
Sources
- PPC Land: Google may skip sitemaps on sites it deems low quality (opens in a new tab)
Source of all details of episode 114, including the transcript points.