Canonical Tag

A Canonical Tag is an HTML element that tells search engines which version of a webpage should be considered the preferred one. Canonical tags are used to avoid duplicate content – that is, identical or very similar content accessible via different URLs.

This is especially relevant for dynamic websites – such as donation shops with filtering and sorting functions, or campaign pages with tracking parameters – where the same content might be indexed multiple times. Without canonical tags, SEO rankings are negatively impacted, as search engines may not know which version to prioritize.

A properly implemented canonical tag (e.g. <link rel="canonical" href="https://www.donationpage.com/emergency-campaign">) points to the original URL and ensures that all SEO signals are attributed to the correct page.