In terms of social media networks such as Instagram, the greater number of followers you've got, the more well-known your brand will be. And it does not count if they're purchased or not. For instance, let us say that you're offering a good quality product on Instagram yet you are only getting a small number of follows and likes right after each post. Then, expect that no one will care about you stating your product is the best.
But if the individuals notice that you've got a huge number of followers on your account, they are more likely to be serious about checking out and buying your products. Moreover, this likewise gives you more chance to acquire new followers as well as likes.