Once you have a bitcoin wallet, you can use a traditional payment method such as a credit card, bank transfer (ACH), or debit card to buy bitcoins on a bitcoin exchange. The bitcoins are then transferred to your wallet. The availability of the above payment methods is subject to the area of jurisdiction and exchange chosen. Below is a screenshot of the bitcoin interface on Coinbase showing how to buy and sell bitcoin and also Bitcoin Cash, Ethereum, and Litecoin, which are other popular virtual currencies. The user clicks the "Buy" tab to buy digital currency and the "Sell" tab to sell digital currency. You select which currency you are buying/selling and which payment method (your bank account or credit card) you want to use.
In order to conduct transactions on the bitcoin network, participants need to run a program called a “wallet.” Bitcoin is not technically “coins,” so it only seems right that a bitcoin wallet would not actually be a wallet. Bitcoin balances are maintained using public and private “keys,” which are long strings of numbers and letters linked through the mathematical encryption algorithm used to create them.