All canonicalization methods must point to the same URL. You must ensure consistency between rel="canonical" tags, sitemaps, and redirect settings.
Problem:
Pages that are set as canonical are blocked in estonia telegram number database robots.txt or have a noindex directive. This prevents the canonical version from being indexed.
Solution:
You cannot specify pages that are blocked from indexing as canonical. Make sure that canonical URLs are crawlable and indexable.
5. Using noindex instead of rel="canonical"
Problem:
Sometimes the noindex directive is used to exclude pages from search instead of the correct use of rel="canonical". This excludes the page from search entirely instead of passing its value to the canonical page.
Solution:
Use the rel="canonical" link tag to pass the weight of duplicate pages to the canonical one, rather than the noindex directive. This directive is only used if the page should be completely excluded from indexing.