The ILA allows you to perform in-system debugging of post-implemented designs on a Xilinx device. Use this feature when there is a need to monitor interfaces and signals in the design.
If you changed the ILA mode to Interface, you can debug and monitor AXI transactions and read and write events in the Waveform window shown in the following figure. The Waveform window displays the interface slots, transactions, events, and signal groups that correspond to the interfaces probed by the interface slots on the ILA.
For more information on System ILA and debugging AXI interfaces in the Vivado Hardware Manager, see this link and this link in the Vivado Design Suite User Guide: Programming and Debugging (UG908).