Purpose of Valid until date in AEPSegment Match capability

Hi,

Would anyone please help me understand what is the purpose of valid until date underAEPSegmentMatch section within segment membership when an audience is shared across their respective Experience Platform environments?

Reference documentation: https://experienceleague.adobe.com/docs/experience-platform/segmentation/ui/segment-match/overview.html?lang=en

Here is an example of how a profile's segment membership looks in the receiver environment.

"segmentMembership":
   {
    "segmentMembership":
    {
        "AEPSegmentMatch":
        {
            "460b99a1-b387-4b09-bbc7-32cf4b22abd0":
            {
                "lastQualificationTime": "2024-01-29T17:13:46Z",
                "status": "realized",
                "validUntil": "2024-02-28T17:13:46Z"
            },
            "32176a24-addb-47b0-86ac-e321d436d45b":
            {
                "lastQualificationTime": "2024-01-30T17:33:34Z",
                "status": "realized",
                "validUntil": "2024-02-29T17:33:34Z"
            }
        },
        "ups":
        {
            "3b0da749-a001-4926-b37a-24c3d54bfc6e":
            {
                "status": "realized",
                "lastQualificationTime": "2024-01-29T23:48:59Z"
            }
        }
    }
}

Thanks,

Upasna