Bitcoin transactions are digitally signed for security. Everyone on the network gets to know about a transaction. A transaction contains 3 pieces of information . The first part contains the bitcoin wallet address of the sender, the second part contains the amount that has been sent, and the third part contains the bitcoin wallet address of the recipient. A bitcoin can also be considered as an invisible currency with only the transaction records between different addresses. Every transaction ever made using Bitcoin is stored in a public ledger called a Blockchain.
https://www.geeksforgeeks.org/what-is-bitcoin/
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It's better i will post blogs on different platforms not similar content