What can be the effect of a weasel word in an ad?

Weasel Words in advertisements (such as "up to 70% off" or "experts agree that..." or "studies have shown...") can sometimes fool people and convince them to buy a product that they would not otherwise want to buy.

However, weasel Words can also harm a company advertising with them. People can be put off by the use of weasel Words, and can form a negative association with the company, becoming less likely to buy their products. In extreme examples where the weasel Words are used to mislead, they can result in lawsuits from individuals or punitive action by the Federal Trade Commission for false advertising.