The Banking page is where you connect your accounts and download transactions. This is sometimes known as "bank feeds." Why connect your accounts? Because it saves you from lots of manual data entry.
Your bank and card companies store information about the money going in and out of your accounts. You want that same information in QuickBooks because it's part of your business finances.
Instead of manually typing it all in, let QuickBooks get the information for you. You choose whether to add transactions as new items or match them up with items you already entered in QuickBooks. After you are connected and the account is configured, QuickBooks downloads your bank data automatically, usually at least once daily.
Get bank data into QuickBooks
Connect your accounts
Update your bank accounts manually