Google is introducing new way of search very soon. This new way of search is called Google Voice Search. Like "voice command" in offline programs, this Google Voice Search will help you when you are inconvenient in typing.
Take an example when you are about to search for recipe, just coming out from the kitchen, and want to search for something through your voice. In this situation, perhaps your hands are not washed and maybe oily, so that it's not convenient to type.
Another situation of why you need to your Google Voice Search is that there are times when you can pronounce a word, but don't know to how to spell. In this case, Google Voice Search maybe useful.
If you feel that you can't type fast, or you want to test your English speaking, you may also find this new feature useful. To get more information on why Google Voice Search is useful, watch the video below.