Satanism has a few different interpretations. The Church of Satan was founded in the 60s and involves worshipping satan as he is portrayed in the Christian bible. Today, The Satanic Temple is much more popular. TST does not worship satan, they are an agnostic religion. This means they do not believe in the existence of God, the devil, angels, etc. They have tenants that are focused on bodily autonomy, freedom of speech, and treating the planet with respect.
“Satanism,” Digital Collections - Lake Forest College, accessed August 10, 2022, http://collections.lakeforest.edu/items/show/6951.