In Help+Manual you edit your text as you would in a word processor, but that is where the similarity ends. After creating your texts you need to turn them into finished documents in one of the supported output formats. We refer to this process as "publishing".
When you publish your output Help+Manual converts your project into your chosen output format, for example a PDF document, a website (WebHelp), a Microsoft help file (HTML Help), an Apple iBooks® ePUB eBook and so on. In some formats this is done directly, in others with the help of an additional program like one of the Microsoft help compilers.