In most cases documents are added as 'files' (a single WORD, PDF, EXCEL, PowerPoint, JPEG file). The 'file' has a title, a one line description (plain text only) and one file.
In some cases it can be helpful to use a 'Page' which provides the ability to have much more descriptive and formatted text and can have multiple files attached - comments are made against the 'page' and not the individual attached documents.
Below is an example 'page' showing the available options.
Pages are created using Actions / New Page (assuming your user profile allows this). Meeting packs can link to pages.
Page descriptions fully formatted text and tables and also links to external websites (use the link icon in the toolbar when editing) can have links to documents stored in GVO (use the small GVO icon in the toolbar).
CLICK HERE to see the differences between Files and Pages