What is the ruling on exaggerating in promoting advertisements, such as using hyperbolic phrases (this is the best website, and you will profit) to promote a website where no money is requested from those who join? Is it permissible to add fictional, impactful stories to product advertisements to motivate the audience to purchase, knowing that these stories contain a part of the truth and a little bit of falsehood? And what is the extent of the necessity for complete truthfulness in advertisements?

Exaggerated promotion of goods through advertisements and publicity, if it involves lying, deception, or concealing defects, is forbidden. It is also a reason for being deprived of the blessing of the sale, based on the Prophet's (peace be upon him) saying: "The two parties to a transaction have the option as long as they have not separated. If they are truthful and clarify, they will be blessed in their transaction. If they lie and conceal, the blessing of their transaction will be effaced." However, if it does not involve lying or deception, but rather praise for the goods based on their true qualities, then this is permissible and not forbidden. Nevertheless, exaggeration in it is disliked. The Prophet (peace be upon him) forbade excessive swearing in sales, so that the buyer would not be misled by it, based on his saying: "Swearing makes the commodity sell, but it obliterates the blessing of the profit." Therefore, it is not permissible to lie in an advertisement, even in a small matter unrelated to the product. It is preferable to avoid exaggeration in praising goods and stating their advantages.