Dear aspirant hope you are doing well...

Use the Ruler in Microsoft Word to see and control page margins, paragraph indents, and more. This feature works the same in all modern versions of Microsoft Word: 2010, 2013, and 2016. To view the Ruler , check it in the Show group (the Show/Hide group in Microsoft Word 2007) on the View tab.

1. It is used for draw the table,making results and assignments etc.
2. ii)It is used for lining.

Hope it's helpful thank you