What is sidebar navigation?
A sidebar is a tremendous, efficient, and important part of the website navigation design. As a rule, it is a component with typography, shading range, or symbols and shows up by the side of the fundamental content— either on the left or the right, depending upon the site design and formation.
Should navbar be on left or right?
Menus and navigation have traditionally been on the left, but many sites choose to put them on the right so that the content can have focus (on the left). So even on PC's there is no clear side which navigation should be on.
What is left navigation?
Left navigation facilitates a vertical scanning direction (yay lists), this greatly improves speed, it also requires fewer visual fixations so we can see multiple navigation links at the same time. ( Side navigation can be positioned on the right for the right to left writing systems)