The terms Header and Footer typically come from word processing programs — these denote repeated elements that show at the top and bottom of every page. Headers and Footers work similarly on PowerPoint slides — the Footer is a line of text that usually appears at the bottom of a slide. By default, the footer with one or more of three placeholders appears on every slide in a presentation — but you can change that as required.
Learn how to add Headers and Footers to slides in PowerPoint 2013 for Windows.

