What's a Canonical URL Tag? How Do I Use It for SEO?

What's a Canonical URL Tag? How Do I Use It for SEO?

Duplicate content is a complicated subject, but when search engines crawl many URLs with identical (or very similar) content, it can cause a number of SEO problems. First, if search crawlers have to wade through too much duplicate content, they may miss some of your unique content. Second, large-scale duplication may dilute your ranking ability. Finally, even if your content does rank, search engines may pick the wrong URL as the "original." Using canonicalization helps you control your duplicate content.