CAM350 is the industry's de facto standard for verification, optimization and output generation to efficiently drive PCB fabrication.
For PCB designers the importance is the ability to check the data which is sent out from the company and used for the fabrication. This eliminates possible (user or system) errors in the postprocessing. The minimum recommended check is to load the Gerber and Excellon files, as well as the IPC netlist and run the comparison. But the tool can do much more.