Played by Andy Serkis as a motion capture character, Snoke is the evil player in The Force Awakens that's pulling all the strings. He is a powerful figure on the Dark Side of the Force.
He has a strong hold over Kylo Ren and appears to be using him as a means to his own ends. As Supreme Leader of the First Order, he also commands General Hux.
Quotes by Snoke:
"We will crush the Resistance, once and for all"
"There has been an awakening, have you felt it? The dark side and the light."
Supreme Leader Snoke: The droid you seek is aboard the Millennium Falcon in the hands of your father, Han... Solo.
Kylo Ren: He means nothing to me.
Supreme Leader Snoke: Even the Knights of Ren have never faced such a test.
Kylo Ren: By the grace of your training I will not be seduced.
Supreme Leader Snoke: We shall see, Kylo Ren. We shall see.
Supreme Leader Snoke: A scavenger resisted you?
Kylo Ren: The Force is strong in her!