To create a default navbar -
Add the classes .navbar, .navbar-default to the <nav> tag.
Add role = "navigation" to the above element, to help with accessibility.
Add a header class .navbar-header to the <div> element. Include an <a> element with class navbar-brand. This will give the text a slightly larger size.
To add links to the navbar, simply add an unordered list with the classes of .nav, .navbar-nav.