Hi John,
a question that needs a lot of words to answer.
Checkout google and ask more specific questions and you get help here :-)
Cheers
Topic: How does Bitcoin work? (Read 88 times)
The Bitcoin network is sharing a public ledger called the "block chain". This ledger contains every transaction ever processed, allowing a user's computer to verify the validity of each transaction. The authenticity of each transaction is protected by digital signatures corresponding to the sending addresses, allowing all users to have full control over sending bitcoins from their own Bitcoin addresses.
As a beginner with Bitcoin, I am really curious that how does Bitcoin work? 
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