Blogger : How to hide and remove Navigation Bar at the top of the page

Every blog you create in Blogger will contain a Navigation Bar also known as Navbar at the top of the every page.
Navbar provides visitors with features like search box, Google+ share button and when signed in, it provides you with the ability to edit posts, edit widgets and to go to Blogger Dashboard directly from your website.
I do not use it that much and think that without it, the site looks a bit more professional.
In this post, you will learn how to remove Blogger Navbar by modifying Blogger Template.