Extra Credits has a nice video “Why You Should Care About CDA 230”. It pays particular heed to the importance for the gaming industry.
It describes the two main provisions as a “shield” (against liability for user speech) and a “band hammer” (allowing content moderation).
It also notes Trump’s executive order May 31, and mentions Biden’s desire to get rid of 230 entirely.
It also notes the problems caused by FOSTA.
It mentions that copyright is not covered by 230, but doesn’t mention that the corresponding mechanism for copyright is the DMCA Safe Harbor.