A Bitcoin wallet is a computerized wallet that can hold Bitcoin as well as other cryptographic forms of money, like Polkadot or ETH. Bitcoin wallet provides you 2 different keys which called the public key and the private key. The public key is the "address" of your wallet. If someone wants to send you bitcoins, they need to know this address. The private key is the “password” to your wallet. If you want to send bitcoins to someone, then you need to present this password to the system. A SEED phrase is like a secret question. The SEED phrase consists of twelve random words, with which you can restore access to your wallet if you lose your private key. When you create a crypto wallet, you get these two keys. They are interconnected by tricky mathematical operations, which we will not go into. There are two types of crypto wallets: Wallet on your device, You download the program, register a wallet and receive keys, after which you can make transactions with bitcoin; Online wallet, register and that's it: all bitcoins are stored in the cloud. However, you need to understand that in this case, the service itself has access to your wallet.