The AutoFit feature in Excel adjusts a column’s width to fit its content automatically.

Steps to AutoFit a Single Column:

1. Place the mouse over the column line in the column heading.
2. The cursor will change into a double arrow.
3. Double-click the mouse.
4. The column width will adjust to fit the content.

Steps to AutoFit Multiple Columns:

1. Select the columns you want to adjust.
2. Go to the Home tab on the ribbon.
3. Click the Format drop-down menu.
4. Choose AutoFit Column Width from the options.

This method works for row height as well. Use it to save time and ensure all your content fits neatly.