The nav bar takes visitors to your blog back to the home-base. It is like walking down the sidewalk and going door to door to visit the different houses.
The Blogger Navbar appears by default at the top of every Blogger-powered blog.
Navbar features include:
The Navbar appears on all freely-hosted Blog*Spot blogs. According to blogger the navbar can be disabled for users publishing via FTP.
You can change the color of your nav bar in the layouts tab. It is available in several colors . If you are using a classic template, you'll see a menu from which you can select a color. For blogs using Layouts, just click the "edit" link on the Navbar page element.
As usual, go to the edit html link from your layouts. BACK UP your code.
Look for the following code.You can do this easily be pressing control +F (in most browsers) and doning a search and find.
Right before that area insert the following;
Preview your blog to make sure it worked and then save it.
The downside of removing this element is that you may get fewer visitors. A normal blog will get many visitors because they landed there thanks to the navbar.