Explain 2 ways in which a belief in Satan influence the way a Christian or Muslim would live their life today?

Well since I'm a Muslim I only know about Muslims so,

Satan whispers to a human and tells them to do bad so u could disobey god, but u can't hear his whisper, it's like ur thinking it yourself, he convinces u to do bad things and once u do it u get a sin. Satan will always whisper to a person until they die and so there is no running away or hiding from him.