"Bait and switch" is a deceptive marketing tactic where a seller advertises a product or service at a low price to attract customers. Once the customer shows interest, the seller either claims the advertised item is unavailable or tries to sell a more expensive alternative. This practice is considered unethical and can lead to consumer distrust. This tactic is often seen in retail and online sales, where companies may promote a product at an attractive price. When customers arrive to purchase it, they find that the item is out of stock or are persuaded to buy a different, pricier option.