What is a Bank Feed? 

A bank feed is an automatically created list of the transaction you spent and received in your bank account. This allows you to tally your financial books.

To activate your Automated Bank Synchronization in your Journal.
Go to Accounting ‣ Configuration ‣ Journals, then open your Bank Journal, click  Edit, and select Automated Bank Synchronization in the Bank Feed field.

You can then connect Odoo to your bank. To do so, go to Accounting ‣ Configuration ‣ Add a Bank Account, and follow the steps.

Once done, go back to your Accounting dashboard. You should now see a Synchronize Now button on your Bank card. Click on this button and enter your bank credentials.

Now your bank feeds will be regularly synchronized!