What is it really mean 'voluntarily obey'?

Max Weber

• power, the ability to force people to obey, regardless of their resistance
• authority, where orders are voluntarily obeyed by those receiving them, and subordinates accept the ideas and directives from above because they are legitimate.

Authority was legitimised - is based upon charismatic, traditional and rational-legal.

And how do you know the 3 exists?

• Charismatic leadership - the individual has some special quality of personality - inspiration.
• Traditional - based upon custom and pracitce.
• The rational-legal - by means of a system of rules and procedures.