A paper wallet is simply a document that contains all the necessary information to generate multiple Bitcoin addresses. It usually contains one or more public keys, private keys, and a Bitcoin address.
Some paper wallet services will generate a wallet for you and provide instructions on how to print it. Others give you full control by providing an HTML page that you can download, print, and upload to a USB drive.
The main advantage of a paper wallet is that it is very low tech and therefore difficult to hack. Paper wallets are not stored on computers or smartphones at all, so there is no digital footprint whatsoever. All you need is a printer and a piece of paper!
The main disadvantage of a paper wallet is that it can be lost or destroyed quite easily. If you lose your paper wallet, there is no way to recover your bitcoins.
This is why it is important to make multiple copies and store them in different locations. You should also keep your paper wallet in a safe place, such as a fireproof safe.
Overall, a paper wallet is a very secure way to store your bitcoins as long as you take proper precautions. Just remember to keep copies in multiple locations and never store all your bitcoins in one place!.