On the Accounting page, you'll see a top navigation bar showing Accounts and Advanced.
Under Advanced, there's a menu with options to manage Categories and Groups.
Select Advanced and then select Groups to view and manage the accounting groups used for accounting and financial reports, such as assets, liabilities, owner's equity, income, expenses, etc.
From this list, you can see the default Groups with their associated accounting type (income, expense, asset, liability, or equity). You can also create a new Group by selecting the [New group] button.
Related: How to create a new accounting group
Additional Groups can be used for more detailed reporting of your books.