Explain the purpose of placing an ampersand before or within a Menu Strip item?

The ampersand (&) is used in a Menu Strip item to designate a keyboard shortcut for that menu item, enabling users to access it quickly using the keyboard. When the menu is displayed, the letter following the ampersand is underlined, indicating that it can be activated by pressing the "Alt" key along with that letter. This enhances user experience by providing an efficient way to navigate menus without relying solely on mouse clicks. Additionally, it improves accessibility for users who may have difficulty using a mouse.