Deplatforming and Section 230

Following the January 6th riot on Capitol Hill, the major social media platforms banned former President Donald Trump, and many accounts related to far-right conspiracy theories. In response, conservative activists have called for the repeal of Section 230 of the Communications Decency Act, saying it would prevent ‘censorship’ of right-wing viewpoints in the future. But what does Section 230 actually say? How are the social media companies determining what can be on their platforms?