It increases productivity as you can talk much faster than you can type.There are many reasons to use dictation software on your Mac but some of the most important ones are:

Text to speech is already in everything from Siri to Google Docs although professional dictation software like Dragon Dictate offer much greater accuracy as they actually learn how you talk. However, most people can speak up to 4000 words in the same time period – that equals a massive potential increase in your productivity especially if you’re having to tediously document business operations. The average person can type anything up to 1000 words in half an hour.