You might be wondering what globals are?
Think about any area of your website that remains intact, no matter what page you happen to be on. These usually include elements like; default banners, content that appears in headers and footers, quick links, and form email responses.
These elements are a site-wide setting and are not controlled at the page level, hence the name, globals. Simply jump into this area of your CMS to update any of the information that appears on your globals.