The message seems to be a short communiqué from Vertida Sefalatis to Veliaf. It confirms that the Sanguinesti order of the Myreque is operational, but in need of support.
After completion of the associated quest, if you have unlocked the entire Hub track, this item can be retrieved from the Quest Item Storage chest at the Quest Point Caravan if lost or destroyed. Otherwise, a new one can be obtained from Vertida Sefalatis
There is no need to keep this item after the quest has been completed. As such, it can be destroyed or kept as you desire.