This feature will bundle your .graph file along with all referenced data tables. A .zip file is created; all source files are left in place. This is useful to save a complete snapshot of, say, your calibration files and model results.
Alternatively, you may wish to do this to send your graph information to a colleague. When received at the other end, the user needs to merely extract all files into the same folder. WRDB Graph will automatically use files found in the same folder as the .graph file, even if the original graph referenced files in different directories.