Peer to Peer, shortened to P2P, is a decentralized transaction between two traders (a pair) without a verifying third party. In this case, other users in the network (nodes) verify a transaction and not the users (nodes) involved.
Etherscan
Etherscan is a free platform where you can explore the Ethereum blockchain and verify Ethereum-based transactions and assess wallets, smart contracts, and blocks. For instance,