A person employed to promote a product or service through demonstrations.

उत्पाद प्रदर्शक

English Usage: The sales demonstrator was successful in increasing the product's visibility at the trade show.

Hindi Usage: बिक्री प्रदर्शनकार व्यापार मेले में उत्पाद की दृश्यता बढ़ाने में सफल रहा।