This read-create SnmpAdminString is a non-volatile label an Auto-Configuration Server assigns to a specific GRE filter row so it can be referenced again later without depending on its table index. It matters operationally because filter indexes can shift as rows are added or removed, while the alias stays stable across reboots. For example, an ACS could tag a filter as 'video-backhaul-filter' and reuse that name in subsequent provisioning sessions to find the same row.