As a website becomes larger and more complex, navigation should focus on helping customers move forward. Helping them move backwards or sideways can cause major distraction and confusion.
In February 2014, the Nielsen Norman Group published an article entitled “Killing Off the Global Navigation: One Trend to Avoid.” The global navigation is a set of links to major areas of a website that tends to be placed in the top banner of every page on the website. Is it necessary? Is it useful?