Which of the following is NOT a correct canonical tag implementation? September 1, 2019 By CertificationAnswers Which of the following is NOT a correct canonical tag implementation? Use rel=”canonical” HTTP header Use rel=”canonical” link tag Use canonical= in robots.txt Related content Related posts:What is a canonical tag?Where should your sitemap be referenced?What pages should be present in the sitemaps?What is the purpose of an optimized title tag?