This read-create DisplayString (1 to 31 characters) holds the operator-assigned name for a PM instance, per its description, giving each configured performance-monitoring collection point a human-readable label distinct from its numeric table index. Because PM instances proliferate across many interfaces and profile types on a busy chassis, this name is what lets an engineer identify a specific instance in a report or alarm without needing to cross-reference its numeric index against the interface and profile type it's attached to. An engineer setting up dozens of PM instances across a chassis would give each a descriptive name, identifying the port and metric, specifically so later PM reports are readable without a lookup table.