SEO de-referencing, also known as de-indexing, is the process of removing a webpage or website from search engine results pages (SERPs). This can happen for a variety of reasons, such as violating search engine guidelines, having low-quality or duplicate content, or being penalized for using black hat SEO tactics. De-referencing can have a significant impact on a website’s visibility and traffic, as it essentially removes it from the online marketplace. It is important for website owners to regularly monitor their SEO performance and make necessary changes to avoid being de-referenced by search engines.