Canonicalization is a way of informing search engines that the URL of a certain website is the original and not a copy. Having a canonical tag helps your websites rankings, as it can prevent the instance of having duplicate content, and helps search engines direct users to the right page.
Sean Si is a Filipino motivational speaker and a Leadership Speaker in the Philippines. He is the head honcho and editor-in-chief of SEO Hacker. He does SEO Services for companies in the Philippines and Abroad. Connect with him at Facebook, LinkedIn or Twitter. Check out his new project, Aquascape Philippines