A snapshot is an image of the first partition (drive C:) which contains the Windows 10 IoT operating system. You can use this image either for system restoration or for distribution to other IGEL devices with Windows 10 IoT that are equipped with the same hardware. Firmware updates from IGEL too are made available as a snapshot file (.snp).
The web server of the IGEL Universal Management Suite can be used to create and install snapshots. Further information can be found in the IGEL UMS manual.