Definitions of the application status indicators

Hi everyone, I am an international student from Turkey. Currently, my application status is “Ready for Review”. However, I have heard that some people had “Further Review Required” before receiving their scores.

My question is, before receiving a decision, how does the application status change? Does it change from Ready for Review to directly Accepted/Rejected, or is there any under review period? Is there such a thing as “Application Reviewed”?

@idsarts99 Here is all of their terminology: https://www.mcgill.ca/applying/nextsteps/track/terminology