When we seek to give glory to God, to hold God up so others can see by the light that shines from God, through us, and we work to love God and others as Jesus commanded, then if we are concerned with earthly concerns, such as amassing wealth or having fashionable clothes, we have chosen to conform to the world. We are not in a place where we can stand apart from the world, and talk about how great God is, as there is no real difference between us and everyone else.
So, if we choose to conform then we are not going to be following God, and if we are not listening to what God is saying to us, then what voice are we following?
We don't have to explicitly choose to be part of this world, by just standing by and watching brothers and sisters in Christ do actions that would pierce Jesus' heart is enough to show that we are conforming. This is probably what most Christians are guilty of, when we listen to ministers speak in ways that Christ would not agree with. For example, when persecution of any particular group, especially those that hate you and would be happy to see you dead, is espoused, rather than laughing, or just standing silently by, we should show what it means to be willing to die for that person, and speak up, even though it costs us friendships, or isolates us, as, we are moving toward God. If we choose to value our friendships, then we have turned away from God, and conformed.
So, Satan does not want to be alone in Hell, he wants as much company as possible, so he will work to ensure that we are thinking more about earthly issues than thinking about God, which is his role.
We see how strong he can be in the story of Job, as he made Job's life miserable, took everything away from him, but Job continued to lean on God, regardless.
So, the terrestrial bonds may keep us away from our heavenly Father, and that is what Satan, as the chief tempter, works to do, to keep us grounded, as we may not explicitly worship him, but the Bible stated that we can only follow one god, so if we are not keeping our eyes on God, and shining as a beacon for others, then we are following Satan, and we have covered up the light. Satan is the examples used as the opposite of God, in that we follow God in heaven or the god of this world, and when it comes down to it, that is what is meant by Satan being the god of this world.