With Covid-19, as we know, many things have changed… The same has happened to the purchasing habits of consumers. This has meant that, in addition to the huge increase in online sales compared to in-store ones, the approach of consumers to what they decide to buy has also changed. In this sense, online reviews have had a boom, so much so that many businesses have decided to include them in their e-commerce, social networks and email marketing. In fact, before buying a product, people want to know the opinions of those who have already purchased and tried that particular product on their skin. There is only one problem: too often the reviews are still fake, made as a result of sponsorships or contracts and therefore not sincere and truthful ....