What is the purpose of a Bitcoin wallet. How does It work?

I'm attempting to understand the workflow of sending bitcoin to a paper wallet and retrieving it. How does it works? What is the purposes of this? I don't understand if what's the meaning of this to us?

When you store bitcoin on an online exchange or in a software wallet, you're relying on that platform's security measures to keep your bitcoin safe. However, if that platform is hacked or compromised in some way, your bitcoin could be lost. That's where paper wallets come in. A paper wallet is a way to store your bitcoin offline, which can help reduce the risk of it being stolen. To create a paper wallet, you'll generate a unique bitcoin address and private key, which are then printed out on a piece of paper. You can then send bitcoin to that address from your software wallet or online exchange. To retrieve the bitcoin from a paper wallet, you'll need to import the private key into a software wallet . This will give you access to the bitcoin stored at that address.