The Global Clocks tables show the type of loads present in each clock region for every global clock net. These tables also include timing clock information and the clock track ID used to route each clock net.
When you sort the table by Global ID in the Vivado IDE, you can identify the clock regions where each global clock net is routed. You can also highlight those regions in the Device view by selecting the corresponding table rows.
The column descriptions match those used in the Clock Primitive, Global Clock Resources, and Global Clock Source Details tables.
The Global Id of any clock net that crosses a clock region without driving loads in that region is marked with a plus sign (+), as shown in the following figure.