Out of the box artefacts that read this property. Append the path to your instance URL to open the record and see how the value is used.
Script include: MobileNowAssistSkill
It sets how long the system waits while polling for an asynchronous skill response, so changing it affects the wait time reported to clients. If the property is unset or empty, the code uses 30,000 milliseconds.
/sys_script_include.do?sys_id=eb02796537312210e459a03174924be8
Script include: MobileResolution
The property is read when an asynchronous operation succeeds, to set how long the system waits for its result before timing out. This changes the timeout communicated to the client; if unset or empty, the default is 30,000 milliseconds.
/sys_script_include.do?sys_id=e36cd2cb4f0312101b984be0b1ce0bcb
Script include: MobileSummarize
The system reads this setting when an asynchronous request is still running and includes its value as the polling timeout in the response. It controls how long the client waits for completion; if the setting is empty or unavailable, the timeout defaults to 30,000 milliseconds.
/sys_script_include.do?sys_id=8e680c089f201210466e130e9a0a1c7d