What does the "Home" key do?

The "Home" key is primarily designed to move the cursor to the beginning of the current line of text. This function is particularly useful when editing or formatting text, as it allows users to quickly navigate back to the start of a line without having to use the arrow keys repeatedly. This capability helps to enhance efficiency in keyboarding tasks, allowing users to make quick adjustments or changes to their documents.

The other options provided do not accurately describe the functionality of the "Home" key. For example, the deletion of an entire document is a much more significant action, typically requiring multiple steps or a different key combination. Similarly, opening settings or closing a window generally involves different commands or buttons within software applications. Understanding the specific function of each key, like the "Home" key, is crucial for effective keyboarding and document management.