Advertisers sometimes use words that invite viewers to make an erroneous interpretation; they appear to promise something but in reality do not. which technique does this refer to?

Deception

Explanation:

False advertisement  is the use of false, misleading, or unproven information to advertise products to consumers. For Example, one type of false advertising is to claim that a product has a health benefit or contains vitamins or minerals in their product whereas actually it does not. This is called "Deception".

Deceptive advertising, also known as false advertising, The use of confusing, misleading, and untrue statements when promoting a product.

If the product representation creates a misleading impression in the mind such as to the price, value or the quality of any goods and services then the behavior is likely to breach the law.

Advertising law will protect consumers from deceptive advertising through the enforcement of specific legislation.