An Ethereum Request for Comment (ERC) is a proposal for a new feature, improvement, or standard for the Ethereum blockchain (like BIP for Bitcoin). It is a way for anyone who has an idea for how to improve Ethereum to submit their proposal to the community for discussion and review. ERCs are typically submitted by Ethereum developers, but anyone can submit a proposal. The process of reviewing and implementing ERCs is designed to be open and transparent, and it is overseen by a group of volunteers known as the Ethereum Improvement Proposals Working Group (EIP WG). ERCs can cover a wide range of topics, including changes to the Ethereum protocol, new features for the software, and improvements to the user experience. You can find ERCs here: https://eips.ethereum.org/erc.