People who work in the data & analytics field are responsible for preparing and analysing data and generating insights from data. Skills and techniques used within data & analytics data cleaning, data formatting, data analysis, data visualization and data tooling.
In a management position someone is responsible for a group of people, typically a team or department, depending on the size of the organization. Managers are responsible for overseeing the execution of business processes and managing a group of people in an operational role.