A scroll bar is a graphical user interface component that allows users to scroll or move through a document or webpage. It is often found on the right or left side of the screen and is used to navigate through content such as articles, images, or lists. There are several synonyms for the term scroll bar, including slider, scrollbar, scroll handle, scroll button, and scroll thumb. These terms are all used interchangeably to describe the same function, although some may refer to specific aspects of the scroll bar design. Overall, the purpose of the scroll bar remains the same regardless of what it is called, providing users with an intuitive way to view and interact with digital content.