Christianity teach Satan is god of this World. This is Shirk - ascribing partners unto God.
In Islam, Satan and his kind are powerless against man. All he can do is plant thoughts in your mind, but regular prayer, fasting and remembrance of God is sufficient to keep him at bay.
In Satanism, Satan is seen as the good guy who wanted Adam and Eve, peace be upon them, to gain knowledge, everlasting life and be God like. GOD had a different plan, and is portrayed as the bad guy.
Hardcore Satanists are able to conduct certain rituals and make offerings in return for gaining knowledge and favours from beyond this realm.
Generally Satan himself Is not interested in humans, unless they be of super importance, in which case they will be assigned a powerful adviser to help shape the World to Satan's liking. People think Satan is the most powerful amongst his kind, but this is not actually true, there are many rulers in his World, and they have their own kingdoms. Some are happy to interact with humans, others hate us and will seek to destroy you if you're not careful. Most people contacting Satan's realm usually come across 'spirit guides' who offer 'alleged' insight into human history, and mankind's purpose. In many instances, complete novices opening their inner eye to the Spirit World will open a portal that they can't close or control. Overtime, depending on what type of entity they've let through, they will hear voices in their head, and slowly start losing control of their own bodies,
The bottom line is, Satan is ultimately a deceiver with limited time, and his only goal is to take as many souls own with him as possible.