Direct selling involves selling products and services directly to consumers without middlemen. It can be done through home visits, online, or other venues. There are two main business models - single-level selling where sellers earn commission on their own sales, and multi-level selling where they also earn from sales of those they recruit. Some advantages are better profits, self-regulation, strong customer relationships, and the ability to work remotely. Popular direct selling companies include Amway, Herbalife, Avon, and Vorwerk. In 2017, direct selling totaled $189.6 billion in global sales.