Which of the following is NOT one of the three types of SERP?

The three main types of Search Engine Results Pages (SERP) categorize the way search results are displayed, and they are classic, universal, and extended. Classic SERP refers to the standard format where links to websites are presented as a list. Universal SERP includes diverse types of content such as images, videos, and news articles, all integrated into the search results to provide a more comprehensive user experience. Extended SERP builds on this, further enhancing the format by including additional features like rich snippets or local packs.

Interactive SERP, however, is not recognized as one of these standard categories. While search engines may incorporate interactive features, such as answer boxes that allow users to engage more dynamically with the content, this does not constitute a separate, widely acknowledged type of SERP. Thus, identifying it as not part of the recognized SERP types aligns with established SEO and digital marketing practices.