This property determines if output should be linearized for fast
viewing over the web.
Linearized PDFs are organized in a special way to enable
efficient access over the web. The output is valid PDF in all ways
but it is structured to allow web viewers to access only the
portions of the PDF that they need.
From a practical point of view this means that a Linearized PDF
opens instantly rather than requiring that the entire PDF is
downloaded before it can be seen.
Adobe sometimes refer to Linearization as Fast Web View.
There is a performance and memory overhead associated with
linearization. However this is something that you should normally
only notice when handling huge documents.