Canonical Tag
01 Definition
Canonical Tag meaning: An HTML tag that names the preferred version of a page among duplicates.
A canonical tag is a link element with rel=canonical that tells search engines which URL is the preferred version when similar or duplicate pages exist. It helps consolidate ranking signals onto one URL and reduce duplicate content issues. Search engines treat it as a strong hint, not a strict command.
Also called
Why it matters
How Canonical Tag fits the work
It guides search engines to index and credit the version you prefer, helping consolidate signals and avoid splitting ranking value across near-duplicate URLs.
In context
A product reachable through several filter URLs used a canonical tag pointing to the clean main URL so signals were credited to one page.
Practical note
Because it is a hint, engines can ignore a canonical that conflicts with other signals. Point it to a valid, indexable URL and keep it consistent to avoid confusion.