<\/p>
Google\u2019s Gary Illyes and Martin Splitt used an episode of the Search Off the Record podcast to walk through how Google\u2019s crawler handles HTML. The conversation revealed differences between how browsers and Googlebot process the same page.<\/p>
The discussion covered resource hints, metadata placement, and HTML validation. Several of Illyes\u2019 explanations challenge assumptions about which technical changes help with search.<\/p>
Browser performance features like Illyes said Google\u2019s DNS resolution doesn\u2019t need the help most sites are trying to provide.<\/p> He stated:<\/p> \u201cIt\u2019s very helpful if you have like a crappy internet to do DNS Prefetching for example. In our case, we don\u2019t need to because we can talk very fast to all the cascading DNS servers.\u201d<\/p> <\/blockquote> He added that Google caches page resources separately and doesn\u2019t fetch them in real time the way a browser does. Illyes said Google does this to reduce bandwidth and server load on the sites it crawls.<\/p> Illyes said:<\/p> \u201cSame with preload. If we are not synchronous then we don\u2019t particularly need to listen and look at preload.\u201d<\/p> <\/blockquote> Google uses the Speculation Rules API to speed up search result clicks for Chrome users. That system works because it operates at the browser level, where latency between a user and a server matters. Googlebot operates from inside Google\u2019s own infrastructure, where those bottlenecks don\u2019t exist.<\/p> Both Illyes and Splitt were clear that these hints still help users. Faster page loads improve retention and conversion. The difference is these changes impact the browser experience, not crawling or indexing.<\/p> Splitt shared a case where a spec-compliant script tag in the head injected an iframe, which triggered the browser\u2019s head-closing behavior. That pushed hreflang link tags into the body, where Splitt said Google\u2019s systems correctly ignored them.<\/p> Illyes explained why Google is strict about this. A He said:<\/p> \u201cI would argue that it\u2019s really quite dangerous to have link elements that carry metadata in the body.\u201d<\/p> <\/blockquote> His reasoning is that if Google accepted canonical tags in the body, it would be possible to hijack that page\u2019s canonical and remove it from search results by injecting markup.<\/p> Illyes previously offered guidance on HTML parsing and rel-canonical implementation, advising spelling out the full URL path in canonical tags to avoid parser ambiguity. That\u2019s the same idea hear, clear placement in the head removes the guesswork.<\/p> Illyes was direct about why valid HTML can\u2019t be a ranking signal. Validity as binary, meaning it\u2019s eiteher valid or it isn\u2019t with no room in between. Illyes said it\u2019s hard to do anything meaningful with a pass\/fail metric.<\/p> \u201cIt\u2019s very hard to say that something is close to valid. And then like what do you do there when something is just close to valid.\u201d<\/p> <\/blockquote> He gave an example that a missing closing span tag makes a page\u2019s HTML technically invalid, but as Illyes put it, \u201cIt\u2019ll not change anything for the user.\u201d<\/p> Splitt agreed, noting that semantic markup like proper heading hierarchy and HTML5 structural elements doesn\u2019t carry meaningful weight for search engines either, though it\u2019s useful for accessibility and user experience.<\/p> Technical audits may flag resource hint opportunities and HTML validation errors. Knowing which of those affect Google\u2019s crawler and which affect browsers can help you prioritize what to fix.<\/p> When hreflang tags, canonical links, or meta robots directives aren\u2019t working as expected, the first place to check is whether they\u2019re ending up in the body after the browser parses the page. A tag that looks correct in your source HTML can end up in the wrong location if a script or iframe triggers early head closure.<\/p> Roger Montti covered Google\u2019s updated crawler caching guidance, which recommends ETag headers to reduce unnecessary crawling. That guidance is consistent with what Illyes described in this episode.<\/p> Splitt mentioned that client hints were the original topic he wanted to cover, and that the HTML parsing discussion was groundwork for a future episode. If that episode happens, it could cover how Googlebot handles the newer The full conversation is available on YouTube and Apple Podcasts.<\/p> <\/div> News,Technical SEO#Google #Explains #Crawler #Ignores #Resource #Hints #sejournal #MattGSouthern1772152153<\/p> ","protected":false},"excerpt":{"rendered":" Google\u2019s Gary Illyes and Martin Splitt used an episode of the Search Off the Record podcast to walk through how Google\u2019s crawler handles HTML. The conversation revealed differences between how browsers and Googlebot process the same page. The discussion covered resource hints, metadata placement, and HTML validation. Several of Illyes\u2019 explanations challenge assumptions about which […]<\/p>\n","protected":false},"author":1,"featured_media":3954,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[4335,211,75,1230,13385,90,13386,80],"class_list":["post-3953","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-accessibility","tag-crawler","tag-explains","tag-google","tag-hints","tag-ignores","tag-mattgsouthern","tag-resource","tag-sejournal"],"acf":[],"_links":{"self":[{"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/posts\/3953","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3953"}],"version-history":[{"count":0,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/posts\/3953\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=\/wp\/v2\/media\/3954"}],"wp:attachment":[{"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3953"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/longzhuplatform.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}dns-prefetch<\/code>, preload<\/code>, prefetch<\/code>, and preconnect<\/code> solve latency problems that Google\u2019s infrastructure doesn\u2019t have.<\/p>
Metadata Belongs In The Head<\/h2>
meta name=\"robots\"<\/code> tag, according to the HTML living standard, can only appear in the head. The same applies to rel=canonical<\/code> link elements.<\/p>
HTML Validity Doesn\u2019t Equal Ranking Advantage<\/h2>
Why This Matters<\/h2>
Looking Ahead<\/h2>
Accept-CH<\/code> and Sec-CH-UA<\/code> headers that are replacing traditional user agent strings.<\/p>