Employee data can be classified into four types: demographic, performance, behavioral, and events-based data.Demographic data includes the basic details of an employee including age, location, education, employment history, etc.Performance data is directly related to productivity and includes time and attendance, manager feedback, customer NPS score, etc.Behavioral data tracks behavioral patterns in employees like their participation in company initiatives, the answers they give in a survey, etc.Events-based data is the open rates of emails, survey completion rates, time spent on the intranet, etc.