on a piece of paper teachers use them when they corrects students tests/texts and put comments down the margins
page layout
It adjusts the margins on the page.
Page setup is used to set the margin of your work before printing.
margins
This can vary depending on the font size, spacing, and margins used. On average, there are about 2,000 characters on a single-spaced typed page with regular font size and margins.
Each Word document has same margins. The default margins are 1 inch at the top and bottom of the page and 1,25 inch from the left and right hand sides of the page. However, if desired, default page margins can be changed numerically.
You can change margins, page orientation, and almost anything else related to how your content will display on the page when printed.
margins
Margins in a memo are used to provide white space around the content, creating a clean and professional appearance. Typically, 1-inch margins on all sides are used in memos to ensure the text is easily readable and fits on the page nicely.
How to change default page margins in excel.
go to "help"type margins go to page setup
Page Layout