Section 230

Section 230 of the Communications Act of 1934 (added by Section 9 of the Communications Decency Act (CDA) / Section 509 of the Telecommunications Act of 1996) was not part of the original Senate legislation, but was added in conference with the House, where it had been separately introduced by Representatives Christopher Cox and Ron Wyden as the Internet Freedom and Family Empowerment Act and passed by a near-unanimous vote on the floor. It added protection for online service providers and users from actions against them based on third-party content, stating in part, "No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider." Effectively, this section immunizes both ISPs and Internet users from liability for torts others commit on their websites or online forums, even if the provider fails to take action after receiving notice of the harmful or offensive content.[7] Through the so-called Good Samaritan provision, this section also protects ISPs from liability for restricting access to certain material or giving others the technical means to restrict access to that material. https://en.wikipedia.org/wiki/Communications_Decency_Act#Section_230

https://en.wikipedia.org/wiki/Section_230