Duplicate Content
What is Duplicate Content? SEO Risks and Solutions
Duplicate Contentrefers to blocks of content that appear in more than one place on the internet — within the same website or between different domain names.
Search engines like Google can have a hard time deciding which of these similar content to index or show higher up. This is the case in the search results decrease in visibility can lead to.
Example:
If you write a blog both on your own site and on the site of a partner without canonical tags If published, Google may not know which one to rank, and this can negatively affect your SEO.