Which of the following is NOT a content format?

Keywords are terms or phrases that people use to search for information online. While essential for SEO and content strategy, they are not a content format themselves; rather, they are elements within content or tools for finding content. Research reports, videos, guides, and interviews are all distinct content formats because they represent different ways of structuring and presenting information to an audience. For example, a research report presents findings, a video delivers visual and auditory information, a guide offers instructions, and an interview shares a conversation.