A bookmark is a physical or digital tool used to mark a specific page or location in a book or document for future reference. It helps users easily return to a particular section or passage without the need to search or remember the page number. Bookmarks can be made of paper, cardstock, fabric, or other materials and often feature decorative designs or personalized elements. In the digital realm, bookmarks are typically created within web browsers to save URLs of websites or online resources that users wish to revisit later. They serve as handy shortcuts, allowing quick access to favorite sites or important information with just a click.