In marketing, a product demonstration (or "demo" for short) is a promotion where a product is demonstrated to potential customers. The goal of such a demonstration is to introduce customers to the product in hopes of getting them to purchase that item.
Products often sampled during demonstrations include new products or new versions of already existing products that have recently been introduced to the commercial marketplace, which the manufacturers are attempting to advertise.
In-store demonstrations are usually performed at large retail locations, such as supermarkets, department or discount stores, or in shopping malls. The products that are promoted at in-store demonstrations may be food and beverages, food preparation equipment, housekeeping products, personal care items, or occasionally other types of goods. The samples that are distributed may either be in readymade packets pre-assembled for the demonstration, or are prepared on site by the demonstrator. Some demonstrations involve the distribution of prepared food, requiring the demonstrator to bring equipment such as a microwave oven or hot plate to the location.
Often, coupons for the product are distributed as part of the demonstration. Some demonstrations consist of coupon distribution only.
Demonstrators may be employees of the store where the demonstration is being performed, employees or the manufacturer of the product, or independent contractors who work for a temp agency. Most are not trained to seek out customers likely to buy the product.
In-store demonstrations allow potential customers to touch or taste a product before they buy.
The concept of the in-store demonstration started to boom in the 1980s.
Trade show 
Prototypes are often demonstrated in trade shows, and are called "tech demos".
Many countries around the world do not place legal restrictions on outdoor product marketing and demonstrations. Salespeople set up temporary sites to demonstrate their wares in order to attract sales.
A wide variety of products are demonstrated roadside throughout the China. Such products include frying pans, induction cookers, rubber gloves, vegetable peelers and slicers, stain removers, and knives.
Included with a purchase, a video on a DVD disc may be provided demonstrating the product's use.
Video product demonstrations can also be found on the Internet at the homepages of companies, or on web hosting sites such as YouTube. One notable example is the viral video Will It Blend? demonstrating Blendtec blenders.
See also