Google had already introduced the voice command support in Google Docs by adding the ability to dictate texts using voice commands. Six months later, now the company has included voice command support for formatting and editing Google Docs using voice commands. The new feature is for the web version of Google Docs.
So if you want to align your text and insert bullets, you can simply give these verbal commands to Google Docs and it will work for you. The entire list of commands has already been given. You can check it out here.
Usually using keyboards to edit and format you doc file is easier when compared to voice commands. This is because the accuracy of listening depends on the computer, your accenr, pronunciation and many more things. Still, the new feature is a welcome one as it will serve person with physical impairments.