Final answer:
The Merge & Center button is in the Alignment group on the HOME tab and is used in Excel to combine and center text in cells.
Step-by-step explanation:
The Merge & Center button is a feature in Microsoft Excel and is used to combine two or more cells into one larger cell and center the text within the newly formed cell. This button can be found in the Alignment group on the HOME tab. Its main purpose is for formatting cells in a worksheet to make the data more organized and visually appealing.