Definition & Meaning of "signature tune"in English

What is a "signature tune"?

A signature tune is a distinctive piece of music associated with a particular program, brand, or individual. Often used in television shows, radio programs, or advertisements, it serves as a recognizable theme that helps create a strong identity or brand presence. The tune is typically memorable and repetitive, designed to be instantly recognizable and to evoke a specific feeling or association each time it is heard.