In ecommerce, Key Performance Indicators (KPIs) are very important because they give metrics that can be measured to assess how well or poorly an online business is doing. They are essential For understanding different parts of a business, such as sales, customers, and effectiveness. Take, for instance, the conversion rate of e-commerce. The percentage of people who visit a site and buy something there went up from 1 % last year to 2 % this year; likewise, average order value surged too.