Driver Verifier monitors kernel-mode drivers and graphics drivers to detect illegal function calls or actions that might corrupt the system. It can subject the drivers to a variety of stresses and tests to find improper behavior.
Continue to use your system normally, and if you know what causes the crash, do that repeatedly. The objective here is to get the system to crash because Driver Verifier is stressing the drivers out. If it doesn't crash for you, then let it run for at least 36 hours of continuous operation.