Final answer:
Software that entices users to purchase products through messages on their screen is known as adware. It is often intrusive and might employ tactics like the bandwagon fallacy to persuade users to buy products.
Step-by-step explanation:
Software that displays messages on your screen enticing you to purchase products is known as adware. This type of software is often bundled with other free applications and can be intrusive, displaying advertisements without the user's consent. Adware can be annoying, as it might show pop-up ads, banner advertisements, or even change browser settings. Sometimes the tactics used by advertisers in adware involve the bandwagon fallacy, where the advertising suggests that 'everyone' is buying a product, to encourage more people to follow suit and make a purchase.