Why do standard documents need a title?

Standard documents, namely articles, books, newspapers and periodicals, are usually given titles. This is to provide readers with clear information and facilitate readers to distinguish different documents. For example, when more than one book is mentioned in an article, if each book has a title, then the reader can clearly know the book corresponding to each book title. In addition, increasing the title of the book is also conducive to highlighting the key points and facilitating readers' identification and memory.