A pamphlet or advertisement from an unscrupulous seller of medical products promises you a 'health miracle'. Their pills, lotions, creams and other products will supposedly cure baldness, arthritis, rheumatism, heart disease, multiple sclerorosis, Parkinson's disease, cancer, obesity, impotency and many other ailments. Or they may promise easy weight loss without the need to diet or exercise.
To prove how amazing the product is you will usually find a fake testimonial from a 'satisfied customer', unsubstantiated claims about the product's effectiveness, false claims that the product has been clinically proven in trials and a worthless 'money back' guarantee.
The product is of course a worthless placebo – and might even be dangerous.