In 2018, an estimated 1.8 billion people worldwide purchase goods online. Global e-retail sales amounted to 2.8 trillion U.S. dollars. This is forcing businesses to move their marketing onto online platforms such as social media networks, websites, and online forums etc. Businesses are also adopting technological tools to adapt to the demands of the digital marketplace, such as automation and e-mail marketing. Here are a few key metrics that you need to focus on for business growth.