Question

why do we need to increase the column width in a worksheet

Answer 1

Change the row height to fit the contents. Select the row or rows that you want to change. On the Home tab, in the Cells group, click Format. Tip: To quickly autofit all rows on the worksheet, click the Select All button, and then double-click the boundary below one of the row headings.

Answer 2

As if the space in one colum is filled