A canonical URL, also known as a canonical link or canonical address, is the preferred and authoritative URL for a specific webpage or content. It serves as the primary and most reliable source for search engines and users to access and index the content. In simpler terms, a canonical URL is the designated “official” link for a webpage, ensuring that all other versions or duplicates of the content are properly attributed and directed to the correct source. This helps to avoid duplicate content issues and ensures that the intended webpage receives proper credit and visibility in search engine results. In essence, a canonical URL acts as a digital fingerprint, uniquely identifying and guiding users and search engines to the original and most relevant version of a webpage.