Yes, free tastings in supermarkets usually have a positive impact on sales, although not always immediately. The simple fact of trying a product reduces the barrier of uncertainty: many times people do not buy something new because they do not know if they will like them, and a small bite can completely change that perception. In addition, when there is a present representative who explains ingredients, uses or quick recipes, the customer not only proves the product, but also receives information that increases their confidence in the purchase.
I have seen cases where tasting products are exhausted that same day, especially if it is something new or with a striking flavor. However, in other cases, the benefit is seen longer term: the consumer remembers what he tested and incorporates it in future purchases. Another key factor is location; If the stand is close to the product gondola, the conversion is usually much higher because it facilitates the decision at the time
