With Auto Fill dragging the fill handle on a cell copies the cell's contents or continues a series of data into adjacent cells?

Auto Fill in spreadsheet applications allows users to quickly replicate the contents of a cell or extend a series of data, such as dates or numbers, by dragging the fill handle (a small square at the bottom-right corner of the selected cell). When you drag the fill handle to adjacent cells, it automatically fills them with the copied content or continues the established pattern. This feature enhances efficiency by reducing the need for manual data entry.