Bookmarks are a tool used by readers to keep track of their progress in a book, allowing them to easily return to the page where they left off without having to remember the page number or having to fold the corner of the page, which can damage the book. They come in various forms and can be as simple as a piece of ribbon, card, or fabric, or as elaborate as metal clips, magnetic strips, or even electronic bookmarks that not only save the page but also provide additional functionalities like time tracking or highlighting text. Bookmarks are not only functional but can also be personal or decorative items that reflect the personality or interests of the reader. They are often used as promotional materials by publishers and bookstores, or as craft projects for children and adults alike, making them both a practical tool for readers and a potential avenue for marketing and personal expression.