A Bitcoin wallet is a software program that allows you to store, receive and send Bitcoin. It is a bit like a virtual wallet in which you store your Bitcoin. Wallets come in different types. You can install a software wallet in the form of a mobile app from the app store or as a desktop application for your computer. Try the BlueWallet, for example.
For customers who want to get started immediately without any technical hurdles, we recommend the Coinfinity Card Wallet - an offline wallet in the format of a bank card.
For higher security or long-term storage, however, hardware wallets such as the BitBox02 or a Trezor are best suited. These are built in such a way that they never have direct contact with the internet despite being connected to a smartphone or computer.
You can find even more wallet options in the support article Which Bitcoin wallets are there?
Please make sure you do your own research and compare options before buying and setting up a wallet. It is important that you choose a wallet where you hold your private keys yourself. You can find out what these are here: What are private and public keys?