Contrary to when style information is hard-coded into the content, separation of style from content allows for the same data to be presented in different ways. This enables:
reuse of fragments of data: the same content should look different in different contexts
multiple output formats: different media (paper, online), different sizes (manuals, reports), different classes of output devices (workstations, hand-held devices)
styles tailored to the reader's preference (e.g., accessibility): print size, color, simplified layout for audio readers
standardized styles: corporate stylesheets can be applied to the content at any time
freedom from style issues for content authors: technical writers needn't be concerned with layout issues because the correct style can be applied later