Here's why:
* Common noun: It refers to a general idea or concept, not a specific person, place, or thing.
* Abstract noun: It represents an idea, quality, or state rather than a concrete object.
Examples:
* Common noun: "The band gave a great performance." (Refers to the action of performing)
* Abstract noun: "Their performance was excellent." (Refers to the quality of the action)
Ultimately, the context will determine which type of noun it is.