The term "unique content" comes from the field of search engine optimization. For ranking a website, it is essential that the content on the site is unique. This means that identical texts can only be found under one URL - but not on other sub-pages or other domains. This individual content is referred to as "unique content." In contrast to this is duplicate content, which is often punished by Google by the website concerned being listed more poorly in the search results or being excluded from the index in extreme cases.