A Link out is simply a link from your website navigation menu that points to an external web page. For example, this link points to google.com
You can create a link out from either the Pages tab or the Navigation tab in Edit Mode.
First choose a name for your link out. This is the title that will show up in your navigation menu.
Next enter the URL (including the “http://”).
You also have the choice of how the page opens. Select whether the page should open in a new window, your existing page, or open in a frame on your website.
Click Save this page when you are done.