Consider a section as a "Group Heading" where you place similar workspaces under one group so that you can keep your sidebar fully organized.

To create a new section in your workspace sidebar, select "New Section"

Hover over the right-hand side of the section that you intend to rename or delete, click on the three dots and select the option required.

Note: Deleting a section will not delete any workspaces that have been placed inside that section.