From a UXMovement.com article:
Top or left menu, there is no absolute answer. When it comes to designing for users, context is king.
A navigation that works well in one context may not fit well for another context. To conclude which navigation is best for youyour application, it's important to understand the different context. Where where the top and left navigation worksmay work best.
scanningScanning
- A left navigation is faster and more efficient for users to scan.
- The left navigation also facilitates a vertical scanning direction that is natural for people,.
- topTop navigation forces a horizontal scanning direction that people often use when they’re reading.
Visibility
- Top navigation items are more visible because they are always above the fold and are easier to find.
- Left navigation items are not always above the fold because sometimes if you have too many items, some of them can get pushed below the fold.
- Top navigations are also easier to find because they are usually accompanied by the header and logo, both of which are visually dominant objects.
priorityPriority
- The left most item carry more visual weight than the other items because of its placement in the primary optical area (top left).
- Items in the top left get more exposure.
- Left nav takes more priority because there is no balance navigation at the right side.
- Items in a top navigation do not have equal weight.
When it comes to design, there are few absolutes where one approach will be 100% effective all the time for all cases. Finding the approach that is best for you and your users, calls for an understanding of the context involved.
