What does the drop-down arrow next to a tab name signify?

The drop-down arrow next to a tab name signifies that the tab is a parent tab. This means that there are additional options or sub-menus associated with the main tab, which can be accessed by clicking on the arrow. This design helps users understand that they can explore further options related to the functionality of the parent tab, enhancing navigation within the interface. By indicating that there are more choices available, it facilitates easier access to various features or settings tied to that particular tab, ultimately providing a more streamlined user experience.