The main purpose of the Stop Comstock Act is to update and revise certain laws related to the distribution and importation of obscene materials in the United States. The Act aims to clarify and modernize the legal framework surrounding what is considered obscene, removing outdated and unnecessary restrictions. Key provisions of the Act include significant changes to existing laws. It removes the terms "indecent" and "immoral" from the definitions of obscene materials, which simplifies the legal language.