Power is said to be the ability to control the action of other people around you.when can change the decision of other people using force or negotiations you are are said to powerful.some types of power include,
Physical power (the rock)
Political power (Joe Biden)
Economic power ( Alinko Dangote)
Expert power (Lionel Messi)
Referent power(Nelson Mandela)
Coercive power(Saddam Hussein) etc
Political power is said to be the ability to control people in a country without problem.but too much political power bring about dictators.
There is a popular saying that power corrupt, but absolute power corrupt absolutely.
By power they generally always means the power to affect other people's lives or make decisions which could affect other people lives. this mostly comes with the political powers because you would generally not care for the lives of people who might get affected with your decisions after some time. This is what people means you get corrupt with power.