The better the reviews, the more we trust a business. And for companies that means a better bottom line. In a months-long investigation and excellent business ethics primer, Marketplace went undercover posing as a new business to discover how companies can buy a positive reputation online. They reveal an entire industry devoted to helping businesses mislead consumers. Host Erica Johnson reveals how cheaters pull it off, and how you can spot a faker.

From the Curio.ca streaming audio-visual collection.