Listen to me carefully, just because you have setup QBO, connected to bank account and downloaded from the bank that does not mean you have hired a bookkeeper to do the job for you. You still have to move from new transaction from bank feed to in QuickBooks area.
From the home page screen > select blue navigation bar on the left > transactions > banking > new transactions > add or find match or transfer
Add = you are adding as new transaction that you do not already have in QuickBooks. It could be for deposit as income. It could be for expense to P&L. Select Payee, Account Category and so on
Find match = transaction is already posted in QuickBooks. Do not want to ADD again. Adding will duplicate the same transaction again. Select Find Match (green color). Done
Transfer = normally refers to transfer from one bank account to another bank account another with the same bank. For example, from checking to savings or vice versa.