First, you might ask, "What is metadata?" Metadata refers to all of the information about a title, as opposed to the content that's in the title. Thus, when we say metadata, we mean things like page count, title, author, price, binding type, and keywords.
To assist customers in identifying their files and organizing their libraries, please include as much metadata as possible (title, authors, keywords, etc.). In Adobe Acrobat, metadata can be entered from the File menu > Properties.
We recommend the use of consistent file-naming conventions for ebook files, using an abbreviated prefix to identify the publisher and/or product line, followed by a short version of the title (i.e., "pubname-ExampleTitle_v1.pdf").
We also suggest that file names use only alphanumeric characters with dashes or underscores, to help make the file name more readable. Many non-alphanumeric characters are incompatible with certain operating systems, so they should be avoided to make the book files universally usable by all customers. Particularly troublesome are single- and double-quotes, exclamation points, commas, and spaces, so definitely avoid those in naming your book file.