What is top NAV vs left NAV?
If you don't have too many different navigational links, using top navigation means users will be able to see all of those options using a tablet in portrait view. If you use a left side navigation, users on a tablet in portrait view will probably find that the navigational links are hidden within a hamburger menu.
Should navigation menu be left or right?
However, the National Cancer Institute's usability researchers suggested a right-hand navigation system is actually more effective. They showed that users click on menu items in the right-hand margin more efficiently than on menu items placed on the left.
What is hidden navigation?
Main navigation links are placed under an icon or button and required an action to appear. Such as the hamburger menu, with three stripes you use in the upper corners of website. It was inspired by mobile design patterns, where screen space is small.