a.k.a. mega drop-down menu, Mega Menu
The mega menu is big, has two-dimensional drop-down panels that are grouped into navigation options, they eliminate scrolling and use typography, icons, and tool tips to explain the userâ€™s choices. They are easy to read and help the design and flow of the Web site. It renders fast, which is an important component for the interface.
There are a few downsides to the mega menu. First, they cover up a lot of content when you roll over the button so if you accidentally roll over one, the content you were looking at disappears under the menu. Also, if you have a small monitor the text on the mega menu could get jumbled and overlap, making it non-functional.
NetLingo Classification: Net Programming