The Force is a term from theStar Warsuniverse. It is a set ofmystical powers that all theJedi andSith have. They can do many things with the Force, such as lifting an object up without touching it, shootinglightning out of their hands,choking people and many other things.
There are two sides to the Force: the light (or good) side and the dark (or bad) side.
The light side is used for good things likehealing. The people who study and learn the light side of the Force are calledJedi.
The dark side of the Force is used by the Sith, the bad guys, in theStar Wars movies. Sith have a lot ofanger,fear, hate andaggression. The dark side of the Force gives the bad guys powers that theJedi, the good guys, do not have. For example,Darth Sidious is able to shootlightning from his fingers. The dark side can seem stronger but that is just because a person who uses the dark side of the Force does not have to hold anything back, he is not restrained.