Add a self-referencing canonical tag to every page

A self-referencing canonical tag on every page provides explicit, unambiguous confirmation to search engines about which specific URL represents the authoritative version of that page's content — this becomes particularly important given how many technical variations of essentially the same URL can exist due to tracking parameters, trailing slashes, or other minor URL variations.

Without explicit canonical tags, search engines must make their own determination about which URL variation represents the authoritative version when multiple technically distinct URLs serve identical or near-identical content — this determination doesn't always align with your actual intended preference, potentially diluting ranking signal across what search engines perceive as separate, competing pages rather than recognizing them as the same content.

The self-referencing aspect specifically — where a page's canonical tag points to itself rather than some other page — confirms that this specific URL is indeed the intended authoritative version, closing off any ambiguity about whether this represents genuine content or a variation that should be consolidated toward some other canonical version.

This becomes especially important for pages accessible through multiple URL paths or with common tracking parameter variations — comprehensive canonical implementation ensures all this ranking signal consolidates toward your genuinely intended authoritative URL rather than fragmenting across technical variations that search engines might otherwise treat as separate pages.