Bitcoin transactions are validated and confirmed by the Bitcoin network. This means that every transaction that is made, must be validated by all participants in the Bitcoin network. The validation process is a consensus system, which ensures the accuracy and security of the transaction.
The Bitcoin network is secure and decentralized, meaning that all transactions are anonymous and secure. This allows for a trustless system of transactions, where no one party is in control of the network. This allows users to transfer funds without the need for a trusted third party. Transactions are also processed quickly and securely, with all transactions being recorded on the blockchain, a public ledger.