If you’ve been following our newsletter, you’ll have seen us report unconfirmed cases of indexing issues around URLs that seem to deviate from Google indexes. We were concerned about the canonical issue with Google and partly correct. Google says it’s not just the canonical issue but the phone indexing issue. It is believed to have started on September 22 or 23. That’s when the SEO community started noticing significant changes in search results.
Google Confirmation. Google said on Twitter through its Search Liaison account, "We are currently working to resolve two separate referral issues that affect certain URLs. One is on mobile-indexing. The other is canonical, how to whatsapp phone number list identify and process duplicate content. In either of these two cases, the page may not be indexed. " Phone index problem. Google explained that in some cases it is not a page index page "if the previously indexed page is gone, it could be a problem with the index page, where we cannot select a page to index."
Canonicalization problem. Google also added that it may not index a page "if it involves a canonical issue, the URL Inspector may display the URL as a duplicate and Google's selected canonical is not the same." I posted several examples of this here at the Search Engine Roundtable and Google even asked for examples earlier this week.