Side selling refers to the practice of offering additional products or services to a customer during a transaction, in addition to the main product or service being purchased. This can be done by the seller or by a third party, and is often used as a way to increase sales and profits. However, it can also be seen as a form of upselling and may be viewed negatively if the additional products or services are not relevant or necessary to the customer’s needs. Side selling can be a successful sales strategy when done ethically and with the customer’s best interests in mind.