An index page is a structured list that helps users quickly find information within a document, website, or book. It typically includes keywords or topics along with corresponding page numbers or links, making navigation easier. Index pages are commonly found in printed materials, such as encyclopedias, and digital formats, like websites. In the context of websites, an index page often serves as the homepage, providing links to various sections or categories. This allows visitors to access content efficiently. For example, an index page for a blog might list different categories of posts, helping readers locate specific topics of interest.