This is the cumulative count of packets UCS Manager has recorded as received on this endpoint since the counter was last reset. It matters on an archived historical sample row of that same receive-counter set, kept purely for trending past intervals rather than showing the current live value because dividing the byte and packet totals gives the average frame size, which is how an admin distinguishes bulk-transfer traffic from a flood of small control-plane frames. On the endpoint this history row belongs to, a totalPackets count rising by 500,000 while totalBytes rises by only 32,000,000 implies an average frame size around 64 bytes — consistent with small keepalive or ACK-only traffic rather than file transfer.