This allows you to see if the voice search understood you or if you need to make some changes. That being said, there is always room for improvement and the good news is that for users of Google’s voice search, the company has announced that they have made some improvements to the feature, in which it will now be faster and more accurate.
Google is also boasting that their new voice search feature is able to cancel out background noise better, so if you are using it in noisy environments it should still be able to pick out your commands. The method behind these improvements is thanks to better neural network acoustic models that uses Connectionist Temporal Classification and sequence discriminative training techniques.
Sounds like quite a mouthful, but basically your voice searches should be very much improved upon. If you are interested in the nitty gritty of how it works, you can head on over to Google’s blog for the more technical details.