What does it mean old / latest version operating system?

In GetMyOS.Com, the operating system marked as the Latest Version called for a new or most recent release, while the Older Version is not recommended for users.

When do we mark the OS as the latest version?

After publishing a new version or update of the operating system in GetMyOS.Com, we mark it to the latest.

When do we mark the OS as the old version?

If the developer terminates support / update for the operating system version, it will be marked as an older version.