In layman’s language, a metric is a quantifiable standard by which business performance can be measured. For instance,
conversion rate, average order value, cart abandonment rate, and traffic sources, all of these are eCommerce metrics that help define development.
Meanwhile, metrics can only be measured if there’s enough data to do an analysis and draw conclusions.
Google Analytics, social media sites, product pages, checkout and
shopping carts, and even homepages are excellent sources of data which help interpret business results and derive trend measurement over time.