Public blockchains are designed to be completely transparent and accessible to all participants. Every transaction on a public blockchain is recorded on a distributed ledger that can be verified by any individual with an internet connection. This structure enhances security and trust among users, as it eliminates the need for a central authority to manage transactions. Public blockchains operate under a consensus mechanism, such as Proof of Work or Proof of Stake, which ensures that all transactions are agreed upon and verified by the network participants. Popular examples of public blockchains include Bitcoin and Ethereum.