Final answer:
The background music you hear in a TV or radio commercial is called a jingle. Jingles are short musical compositions that promote a product or service.
Step-by-step explanation:
The background instrumental or vocal music you hear in a TV or radio commercial is known as a jingle. A jingle is a short musical composition that is used to promote a product or service. It is usually catchy and memorable, with lyrics that convey the message or the brand. Jingles are often used in commercials to create brand recognition and leave a lasting impression on the audience.
Learn more about Background music in TV and radio commercials