Margin is the space between your content and the edge of the page
Margins are set to Normal, which is a one-inch space between the content and each edge of the page.
You may need to adjust the margins to make your data fit more comfortably on the page.
To better align an Excel worksheet on a printed page, you can change margins, specify custom margins, or centre the worksheet—either horizontally or vertically on the page.
Page margins are the blank spaces between your data and the edges of the printed page. Top and bottom page margins can be used for things such as headers, footers, and page numbers.