Provide more efficient scanning

Vertical navigation boosts scannability by taking advantage of users' natural viewing patterns and improving how quickly they can find what they need. Studies show that users focus on the left side of the screen 80% of the time, so placing navigation menus there makes them more noticeable and easier to scan.^[1]

Research also shows that vertical lists are easier to search than horizontal ones.^[2] Users can find what they’re looking for with fewer eye movements because they can see more information at once.