Each Bitcoin is basically a computer file which is stored in a 'digital wallet' app on a smartphone or computer. People can send Bitcoins (or part of one) to your digital wallet, and you can send Bitcoins to other people. Every single transaction is recorded in a public list called the blockchain. This makes it possible to trace the history of Bitcoins to stop people from spending coins they do not own, making copies or undo-ing transactions. You can see how those transactions practically work on this site https://bittrade.one/chart/binance/ethusdt
. I think now you have a general understanding of how bitcoin works. Goodbye.