Your Wallet is the place that allows you to send and receive cryptocurrencies, NFTs and more. It's your home base for interacting with dapps (Decentralised Applications) such as objkt.com. The two most commonly used wallets on Tezos are Temple Wallet and Kukai Wallet. These work on both your mobile phone and desktop browsers.
Setting up a new wallet is simple and should require no longer than ~5-10 minutes of your time.