Are drop-down menus good?
The use case for drop-down menus
They also help conserve screen space. Offering drop-down menus can help users avoid scrolling and can quickly get them access to your site's content. For large websites, drop-down menus can save users time by allowing them to jump down a level or two to get to the content they seek.
Why should you avoid drop-down menus on navigation?
Drop-downs can sometimes render a website unusable on an iPhone or Blackberry and can also make life difficult on iPads. Drop-down menus can also encourage "navigation creep" in which the website owners keep adding more and more menu options simply because they can.
Are dropdown menus bad?
As a general rule, most Web developers, especially usability enthusiasts, say it is bad practice to use drop-down menus because they are confusing, annoying and oftentimes dysfunctional. From a design standpoint, however, drop-down menus are an excellent feature because they help clean up a busy layout.