We require "id" while generating canonical tag for the product pages. I tested with couple of online SEO tools and result seems to be fine.
Posts made by SDdigital
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RE: Increase in duplicate page titles due to canonical tag issueposted in Intermediate & Advanced SEO
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Increase in duplicate page titles due to canonical tag issueposted in Intermediate & Advanced SEO
Implemented canonical tag (months back) in product pages to avoid duplicate content issue. But Google picks up the URL variations and increases duplicate page title errors in Search Console.
Original URL: www.example.com/first-product-name-123456
Canonical tag:
Variation 1: www.example.com/first-product--name-123456
Canonical tag:
Variation 2: www.example.com/first-product-name-sync-123456
Canonical tag:
Kindly advice the right solution to fix the issue.