User behavior is considered to be a range of specific actions users perform at a website, working with a mobile app, or interacting with any other type of interface. It includes all sorts of activity — from surfing website’s pages to clicks on particular buttons.
A deeper understanding of user behavior facilities to build up efficient products and enhance existing services. To analyze user behavior a huge number of metrics are used, such as session length, heat maps, eye tracking, conversion rate. This combination of analytical methods is called User behavior analytics (UBA).