When the text is finished and there are still many blanks, you can write some information about the author in the blank places, indicating that the text is not enough and can be supplemented.
The inscription is a supplement and perfection to the text. There is only one paragraph of text, which is written by people who don't know why and when, so that people can't see the complete information of the work. If there is a signature, people will know it at a glance. It is a responsible practice to sign before writing. No matter who wrote the work, no matter what the writing level is, people can identify and compare it after signing, especially for some collectors, who determine the authenticity of the work by signing.