Zentrex
People keep complaining that we never got any information on Snoke, but that's just because we haven't seen much of him in a story context. We have a lot of information about him from other, admittedly more boring sources. So, here's all I've managed to gather about him. Hopefully this will make people stop saying he's a Palpatine rip-off. Any discussion is welcome, and so is more information, and critisisms of the validity of the information presented.
His origins are unclear.
Snoke is an ancient being, who was once beautiful, but suffered grave injuries which made him vulnerable, causing him to escape to the Unkown Regions, where he would await the day he could return. (Art of the Force Awakens)
He stayed in the Unknown Regions, watching the events unfold in the galaxy through the Force, and watched as the Empire rose and fell, and he concluded that the reason it fell was because of the sentiment which remained in Vader. He also concluded that only if one was to be fully rid of sentiment, would a solid rule be possible. (The Force Awakens Novelization)
When the Emperor, accounting for his death, tried to push into the Unknown Regions, he felt the presence of what he believed to be the very essense of the Dark Side. Darth Vader could not feel this presence. Sidious decided to start sending missions to the Unknown Regions, but none of the missions were successful, only aiding to make venturing further than they had a tiny bit safer for the next suicide mission. When Sidious died, Gallius Rax started to push into the Unknown Regions, but was betrayed by Rae Sloane, who herself went into the Unknown Regions with Brendol and Armitage Hux. (The Aftermath Trilogy)
A group of imperials who had fled into the Unknown Regions (likely Sloane and team) found hyperspace blaze trails left by Snoke's attendants: tall, silent, purple-dressed attendants, who used ancient technology to see things in space which would otherwise be impossible to observe. These hyperspace blaze trails helped the crew survive. (The Visual Dictionary for the Last Jedi)
Snoke then came to into the galaxy, and at some point went to the catacombs below Darth Vader's abode on Mustafar to get an obsidian ring inscribed with the symbols of the four sages of Dwartii. (The Visual Dictionary for the Last Jedi)
Then, wanting to kill Luke Skywalker and end the Jedi, he trained at least one other apprentice before finding Ben Solo, who he decided was the only person capable of killing Luke. He started filling Ben's mind with violent and dark thoughts, and when Ben was sent to train with Luke at the Jed academy, he turned fully to the dark side and destroyed the Jedi Academy. Luke blamed himself and went into hiding, wanting the Jedi to end, and disconnecting himself from the Force. Leia blamed Snoke. Snoke then trained Ben, naming him "Kylo Ren, the master of the Knights of Ren" in both the Dark and Light sides of the Force, claiming that one must be built on both to truly be powerful. Then, he took over the First Order, and became its Supreme Leader. (The Last Jedi, Star Wars Insider: The Last Jedi, The Force Awakens Novelization, StarWars.com: Supreme Leader Snoke)
The First Order faced resistance from the Resistance, a militia trying to protect the New Republic, which was unarmed and defenseless. Each planet was given its own armaments, as decided under the new republic by Mon Mothma. To solve this problem, the First Order created chaos in the galaxy by destroying the Hosnian system, the center of the New Republic, leaving the galaxy in anarchy. Snoke, having suffered as much as he had in the unknown regions, wanted to cause others suffering, and thus was not content with simply the destruction of the resistance, but instead wanted to make the resistance suffer, suffer as he had. (The Force Awakens, The Force Awakens novelization, The Aftermath trilogy, interview with Andy Serkis)
During his reign as Supreme Leader, a random girl named Rey entered the picture, and both Ren and Snoke sensed an "awakening" in the Force. Snoke believed that there would always be two equals in the dark and the light side of the Force, and because of this, both Kylo and Snoke suspected that the Jedi they had wanted to kill was not Luke, but instead Rey. (The Force Awakens, The Last Jedi)
Snoke had wanted to kill Luke, and then finish Kylo soon afterwards, a plan that Han Solo and Leia Organa seemed to be aware of. Kylo had originally fallen for Snoke's lies, believing that the Supreme Leader was wise, but then, after his first battle with Rey on Starkiller base, in which he realized without a doubt that Rey was the one Snoke wanted to kill, not Luke, he decided he wanted instead to train Rey in the ways of the Force and rule the galaxy hand in hand with her. Rey refused by cutting part of his face off, and he had to be saved by General Hux, under the orders of Snoke, who wanted to "complete" his training. (Interview with Andy Serkis, The Force Awakens, The Force Awakens Novelization)
Snoke still believed that Luke was the Jedi he wanted to kill, but was upset over the fact that Kylo's training was not yielding the results that he had wanted. Kylo was nowhere as powerful as Luke, and that bothered Snoke. So, he sent Kylo to kill his mother, which Kylo couldn't do. (Interview with Andy Serkis, The Last Jedi)
Then, learning that Rey was the Jedi he wanted to kill, he created a force bond between Rey and Ren, connecting them over atronomical distances. In this bond, Kylo and Rey started empathizing with one another, until Luke came in and broke the bond. Then, Rey, who had learned the full story of the seduction of Kylo Ren, was captured, willingly, onto Snoke's ship. Here, Snoke played around with Rey and tried to kill her using Kylo, who had been fully devoid of sentiment as he'd wanted. In his hubris, he succeeded where Palpatine failed, but failed where Palpatine succeeded. Kylo, wanting to rule the galaxy with Rey, killed Snoke, and tried to get Rey to his side, which failed. (Andy Serkis on Conan, Interview with Andy Serkis, The Last Jedi)
There are other conspiracy theories out there, and just to be thorough, here they are:
The Prime Jedi - Snoke "looks" like the mosaic on Ahch-To, which depicts the first jedi in a state of balance between the light and the dark sides of the Force, something Snoke is shown to want to do. He either has hair, or a halo, and is holding a lighstaber which is black in color. The darksaber is canon, and uses a black kybercrystal, similar to the obsidian ring that snoke has.
Snoke wanted to die - Some say that Snoke was not betrayed in his hubris, but was instead planning on this all along. He says that he sees Kylo's every intent, and that he cannot be betrayed. He knew that to "complete" Kylo's training, he would need Kylo to have a desire for power and to be willing to kill for it.
Snoke isn't dead - The silk shoes that he was wearing made a sound, he looked different from film to film, the art of the last jedi showed the possibility of a dark side ghost, his body sucked; so he would want to be free of it, he could have been using force projection, there's probably more, but it's even more reachy and stupid than what's already been said, so I'll spare you that.
His origins are unclear.
Snoke is an ancient being, who was once beautiful, but suffered grave injuries which made him vulnerable, causing him to escape to the Unkown Regions, where he would await the day he could return. (Art of the Force Awakens)
He stayed in the Unknown Regions, watching the events unfold in the galaxy through the Force, and watched as the Empire rose and fell, and he concluded that the reason it fell was because of the sentiment which remained in Vader. He also concluded that only if one was to be fully rid of sentiment, would a solid rule be possible. (The Force Awakens Novelization)
When the Emperor, accounting for his death, tried to push into the Unknown Regions, he felt the presence of what he believed to be the very essense of the Dark Side. Darth Vader could not feel this presence. Sidious decided to start sending missions to the Unknown Regions, but none of the missions were successful, only aiding to make venturing further than they had a tiny bit safer for the next suicide mission. When Sidious died, Gallius Rax started to push into the Unknown Regions, but was betrayed by Rae Sloane, who herself went into the Unknown Regions with Brendol and Armitage Hux. (The Aftermath Trilogy)
A group of imperials who had fled into the Unknown Regions (likely Sloane and team) found hyperspace blaze trails left by Snoke's attendants: tall, silent, purple-dressed attendants, who used ancient technology to see things in space which would otherwise be impossible to observe. These hyperspace blaze trails helped the crew survive. (The Visual Dictionary for the Last Jedi)
Snoke then came to into the galaxy, and at some point went to the catacombs below Darth Vader's abode on Mustafar to get an obsidian ring inscribed with the symbols of the four sages of Dwartii. (The Visual Dictionary for the Last Jedi)
Then, wanting to kill Luke Skywalker and end the Jedi, he trained at least one other apprentice before finding Ben Solo, who he decided was the only person capable of killing Luke. He started filling Ben's mind with violent and dark thoughts, and when Ben was sent to train with Luke at the Jed academy, he turned fully to the dark side and destroyed the Jedi Academy. Luke blamed himself and went into hiding, wanting the Jedi to end, and disconnecting himself from the Force. Leia blamed Snoke. Snoke then trained Ben, naming him "Kylo Ren, the master of the Knights of Ren" in both the Dark and Light sides of the Force, claiming that one must be built on both to truly be powerful. Then, he took over the First Order, and became its Supreme Leader. (The Last Jedi, Star Wars Insider: The Last Jedi, The Force Awakens Novelization, StarWars.com: Supreme Leader Snoke)
The First Order faced resistance from the Resistance, a militia trying to protect the New Republic, which was unarmed and defenseless. Each planet was given its own armaments, as decided under the new republic by Mon Mothma. To solve this problem, the First Order created chaos in the galaxy by destroying the Hosnian system, the center of the New Republic, leaving the galaxy in anarchy. Snoke, having suffered as much as he had in the unknown regions, wanted to cause others suffering, and thus was not content with simply the destruction of the resistance, but instead wanted to make the resistance suffer, suffer as he had. (The Force Awakens, The Force Awakens novelization, The Aftermath trilogy, interview with Andy Serkis)
During his reign as Supreme Leader, a random girl named Rey entered the picture, and both Ren and Snoke sensed an "awakening" in the Force. Snoke believed that there would always be two equals in the dark and the light side of the Force, and because of this, both Kylo and Snoke suspected that the Jedi they had wanted to kill was not Luke, but instead Rey. (The Force Awakens, The Last Jedi)
Snoke had wanted to kill Luke, and then finish Kylo soon afterwards, a plan that Han Solo and Leia Organa seemed to be aware of. Kylo had originally fallen for Snoke's lies, believing that the Supreme Leader was wise, but then, after his first battle with Rey on Starkiller base, in which he realized without a doubt that Rey was the one Snoke wanted to kill, not Luke, he decided he wanted instead to train Rey in the ways of the Force and rule the galaxy hand in hand with her. Rey refused by cutting part of his face off, and he had to be saved by General Hux, under the orders of Snoke, who wanted to "complete" his training. (Interview with Andy Serkis, The Force Awakens, The Force Awakens Novelization)
Snoke still believed that Luke was the Jedi he wanted to kill, but was upset over the fact that Kylo's training was not yielding the results that he had wanted. Kylo was nowhere as powerful as Luke, and that bothered Snoke. So, he sent Kylo to kill his mother, which Kylo couldn't do. (Interview with Andy Serkis, The Last Jedi)
Then, learning that Rey was the Jedi he wanted to kill, he created a force bond between Rey and Ren, connecting them over atronomical distances. In this bond, Kylo and Rey started empathizing with one another, until Luke came in and broke the bond. Then, Rey, who had learned the full story of the seduction of Kylo Ren, was captured, willingly, onto Snoke's ship. Here, Snoke played around with Rey and tried to kill her using Kylo, who had been fully devoid of sentiment as he'd wanted. In his hubris, he succeeded where Palpatine failed, but failed where Palpatine succeeded. Kylo, wanting to rule the galaxy with Rey, killed Snoke, and tried to get Rey to his side, which failed. (Andy Serkis on Conan, Interview with Andy Serkis, The Last Jedi)
There are other conspiracy theories out there, and just to be thorough, here they are:
The Prime Jedi - Snoke "looks" like the mosaic on Ahch-To, which depicts the first jedi in a state of balance between the light and the dark sides of the Force, something Snoke is shown to want to do. He either has hair, or a halo, and is holding a lighstaber which is black in color. The darksaber is canon, and uses a black kybercrystal, similar to the obsidian ring that snoke has.
Snoke wanted to die - Some say that Snoke was not betrayed in his hubris, but was instead planning on this all along. He says that he sees Kylo's every intent, and that he cannot be betrayed. He knew that to "complete" Kylo's training, he would need Kylo to have a desire for power and to be willing to kill for it.
Snoke isn't dead - The silk shoes that he was wearing made a sound, he looked different from film to film, the art of the last jedi showed the possibility of a dark side ghost, his body sucked; so he would want to be free of it, he could have been using force projection, there's probably more, but it's even more reachy and stupid than what's already been said, so I'll spare you that.