Put someone in a trance
Physical contact or hand gesture at close proximity
Hypnosis is a magical ability which allows the user to put someone in a trance. This is often done through physical contact with the victim or through a hand gesture at close proximity. After this is done, the user can command their victim to do whatever they desire. Close contact must be made for this power to work and it works better the longer and more intense the contact is; which is why some users of this power choose to activate it with physical contact; such as a kiss.
Once tapping into Prue's fear of her sisters being in danger, Barbas was able to put Prue in a hypnotic trance by slowly brushing his hand against her forehead. In this hypnotic state, Prue believed that her sisters were replaced by impostors. Piper and Phoebe were able to talk her out of the trance, but it took them quite a bit of time. ("(Ms. Hellfire)")
The Demon of Illusion was able to use this ability by unleashing streams of dust-like particles to calm down the movie audience and place them in a trance. He used this ability to calm them down before using his power of Rage Projection to make them extremely violent. ("Chick Flick")
In the Season 3 episode "Bride and Gloom", Dantalian, a dark priestess, turned Prue evil by marrying her to a warlock, Zile. This rendered Prue in a trance-like state during which Dantalian demanded her to kill Piper and Phoebe. As she was totally under the power of Dantalian, Prue couldn't resist her orders. She went to stab her sisters and even telekinetically threw them back to defend herself. Fortunately, the curse was lifted when Piper literally froze and shattered Zile, vanquishing him, the marital bond and therefore Danatalian's power over them both.
The Wicked Witch was capable of putting Adam Prinze in a trance simply by kissing him. Once under the hypnosis, Adam was compelled to do everything that the witch commanded him to. He struggled a little to fight the power when it came to killing Phoebe, but his efforts weren't nearly enough and Cole had to freeze him in order to stop him from carrying out the witch's plan. Adam was freed from her power once she had been vanquished. ("Happily Ever After")
In the Season 8 episode "The Last Temptation of Christy", The Triad were able to hypnotise Christy. When Billie went to save her, she stood there and did nothing whilst Billie was under attack. Billie was able to break the hypnosis by talking to Christy and getting her to believe.