After you pushed content using git or the editor, GitBook.com will start different builds:
- website: it will generate the website
- json: it will extract metadata about the book (summary, introduction, etc)
- epub: it will generate the epub download
- pdf: it will generate the pdf download
These builds are listed and detailed on the History tab of your book.
If your book is linked to GitHub, it may happen that GitHub doesn't signal changes to GitBook (for example: if authorizations are reset). Information on how to fix this issue is available on the GitHub integration section.
If your build failed, you can use the logs to debug the issue and publish a fixed content.