Satan is known as the tempter.  it has been foretold that Christ Jesus will come back to Earth, and when that happens, he will throw Satan into the lake of fire where he will suffer for eternity.  Satan is called the temter, because he temts people to sin.  he does this becaus he does not want to suffer alone.  and God allows this, so that we may prove our faith.  but God also puts a collor on Satan, in that Satan is cannot tempt us more than we can bare (handle).  this also makes that whole statement "the devil made me do it" a complete and udder lie.  from now unto our death we will always have a choice: follow God or give into the temtations that Satan has placed before us and join him in eternal damnation.
What does satan do?