Many companies have used the online retail industry as a means to market their products to consumers through media-powered products reviews, and this has created a marketing strategy that is called Amazon Influencer Marketing. Influencers earn money by promoting their own products with product reviews. People who are interested in your products like you, and that's why these people buy those products and become a fan of you. As the company is growing, so the numbers of people that will be affected by the growth of the company become larger and larger.
In order to promote their products they try to offer the review to the people who are attracted by them. These are the people who are interested in purchasing your products, and they are the influencers. A few companies actually create a platform that will allow these people to share their positive reviews with their network of fans.