Cara Pettersen tells us about the benefits from using canonical tags. She starts with the definition and explains what to look for when choosing a preferred canonical URL, and how to internally link to one. She explains that "cross-domain canonical tags are exactly as they sound, referencing a relationship of URLs across another domain." Pettersen says marketers need to use the tags because it helps to clean up duplication and can be used on duplicate pages and near duplicate pages. Read the article here.