The Tab Key is a key found on computer keyboards, typically located on the left side above the Caps Lock key. It is primarily used to create horizontal space in text documents, allowing users to indent paragraphs or move the cursor to the next tab stop. This functionality is especially useful in word processing applications like Microsoft Word or Google Docs. In addition to text formatting, the Tab Key is often used for navigation within software applications. Pressing the Tab Key can move the focus between different fields or buttons in forms and menus, making it easier for users to interact with programs without using a mouse.