Easily collaborate on documents, spreadsheets, and slideshow presentations. Your docs are stored securely in the cloud where anyone you share them with (but only those people) can work on them, either individually or all at the same time.
Click here for Google's overview of Google Docs, Sheets and Slides
Where do I find Google's own help for Google Docs?
Google's official resource is their Google Docs editors Help Center
Voice Typing in Google Docs (Chrome only)
With Voice typing, you can record ideas or even compose an entire essay without touching your keyboard. To get started, activate Voice typing in the Tools menu when you're using Docs in Chrome. Then just tap the microphone button and speak your mind. Voice typing is available in more than 40 languages. Voilà!