BIP

• A BIP, or Bitcoin Improvement Proposal, is a technical document that addresses issues for change in the Bitcoin core client.
• A set of proposals that members of the bitcoin community have submitted to improve bitcoin. For example, BIP0021 is a proposal to improve the bitcoin uniform resource identifier (URI) scheme.

• Bitcoin proposals are sent out to interested parties and published publicly. The voting on whether a proposal is good for the community comes down to all involved participants, but more specifically the miners and mining pool operators as they carry the full node and are therefore capable of refusing to participate.
• https://www.cryptocompare.com/coins/guides/what-is-a-bips-bitcoin-improvement-proposal/