An Photo, audio or video clip that has been edited and manipulated to seem real or believable. The most dangerous consequence of the popularity of deepfakes is that they can easily convince people into believing a certain story or theory that may result in user-behavior with a bigger impact as in political or financial.
This are Very hard to spot, And People that lean toward Conspiracy Theories are quick to jump and spread them.
Some items that are NOT Deepfakes
Yes we did land on the moon, several times, the last time was in 1972.
yes 9/11 did happen plans did crash into the twin tower, pentagon and a field.
The best research will tell you if it is a fake or not. check REAL New Source, not Extremists websites.