A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
If you insert object and choose Link, or use a hyperlink, then the object is NOT embedded. It's linked, and the file that contains it must be distributed along with the PPT that contains the link.
If you insert an object and do NOT choose Link, the object will be embedded ... meaning that the entire contents of the file will be included in the PPT/PPTX file, and recipients of the PPT/PPTX will be able to launch the embedded file by double-clicking it (assuming that they have the necessary application installed on their PC).