The argument from repetition (argumentum  ad nauseam or argumentum ad infinitum) is  

a logical fallacy that occurs when  someone repeatedly asserts a point,  

irrespective of contradiction  or lack of supporting evidence,  

in the belief that the repetition will  make the argument more persuasive or true.

This fallacy is based on the idea  that a statement becomes true,  

or at least more believable,  the more it is repeated.

Everyday Example: A company  claims that its juice cleanse  

is a "miracle detoxifier." Despite a lack of  scientific evidence supporting detox claims,  

the company's advertisements repeat the assertion  incessantly across various media platforms.

The repetition is used as a strategy to embed  the idea in the consciousness of the public,  

hoping that consumers will accept the claim  as true simply because it has been stated  

so frequently and confidently, not because  any substantive evidence has been provided.