Wallets are simply like a bank for storing, depositing and withdrawing Bitcoin to another Bitcoin address elsewhere, note that there are centralized and decentralized wallets while I will advise you to use decentralized wallet for usage. Example of decentralization wallets are trust wallet, electrum, blue wallet and others.

Be sure to always keep the secret phrase given to you off those wallets, if you lose it, your coins are lost forever, never store your wallet seed phrase online, rather write it on a paper for tight security reasons.