What is a Canonical Tag?
Often referred to as a “rel=canonical,” a canonical tag is something that tells search engines that a certain URL (Uniform Resource Locator) is the master copy or authoritative source for a piece of web content. This means that, even if there are multiple versions of the same piece of content that all have different URLs, the canonical tag lets the search engine know which of these versions is the primary source. Typically, the canonical tag will appear in the HTML head of your landing page.
Another way to think of canonical tags is as the technical SEO version of including a citation as one would do in a research or academic paper. A canonical tag is a lot like giving credit to the original material for a piece of content, thus preventing duplicate content penalties. In short, a canonical tag is a quick and easy way to avoid duplicate content issues that can lead to major consequences.
Why is Understanding a Canonical Tag Important?
It’s no secret that plagiarism is a big problem, especially when it’s easier than ever to simply copy and paste content from the Internet and call it your own. In most aspects of life, plagiarism has high stakes. For example, many colleges punish this offense with expulsion. In the online business world, plagiarism comes at a heavy price as well. Committing this offense could result in your business having its credibility compromised or totally destroyed at best.
Duplicate content is especially dangerous because people and search engines perceive content differently. We might think that a similar web address (think one containing “www.” and one without) is actually the same page. The only difference in the URL is how a user arrives on the page. For search engines, however, this is not the case.
Even if the different web addresses ultimately take you to the same page, a search engine will perceive a specific URL for each version – meaning the search engine sees each as a unique page. When this happens, it looks like the pages are duplicates, or that one has totally copied the content of another.
In the eyes of most search engines, this is plagiarism and will come with consequences such as a much lower rank on the search engine results page, or SERP. A lower rank will negatively impact your SEO, putting your business in a bad position. Though duplicate content can come with drastic results, canonicalization is the best solution. A canonical tag helps you be safe rather than sorry!