A page number refers to a specific position on a sheet of paper within a book, document or other written material. It is an identifier that indicates the location of a particular paragraph, sentence, image or table on a given page in relation to others on the same page. Page numbers are usually printed at the top right corner of each page and help readers locate specific information quickly without having to read through the entire text. In addition, they provide a way for referencing sources by indicating where quotes, figures or tables appear within the context of the publication.