Promoters have used newspapers, special events, endorsements, Promotions can be held in physical environments at special events such as concerts, festivals, trade shows, and in the field, such as in grocery or department stores. Interactions in the field allow immediate purchases. The purchase of a product can be incentive with discounts (i.e., coupons), free items, or a contest. This method is used to increase the sales of a given product. Interactions between the brand and the customer are performed by a brand ambassador or promotional model who represents the product in physical environments. Brand ambassadors or promotional models are hired by a marketing company, which in turn is booked by the brand to represent the product or service. Person-to-person interaction, as opposed to media-to-person involvement, establishes connections that add another dimension to promotion. Building a community through promoting goods and services can lead to brand loyalty.