Think of Google Drive as your USB Flash Drive in the Cloud. Anything you can put on your Flash Drive, you can drag and drop into your Drive stream (see picture on left below). Most Microsoft formatted documents (Word, PowerPoint, and Excel) will convert into the Google Doc equivalent.
Drive is your dashboard for all G Suite apps including Docs, Slides, Forms, Sheets, Drawings, and My Maps. They are stored here to access anytime from any computer and you can create new documents by clicking the blue NEW button in the upper left-hand corner. The NEW button also has options for you too also upload documents or folders from your desktop and create new Folders for organizing your documents.
You can easily organize your Drive by dragging and dropping documents into Folders. You can also nest sub-Folders in Folders by dragging and dropping them into each other.
All documents in Google drive can be shared with one or more people in one of two ways: 1) share directly with an email address or 2) share the link of a document or folder for others to click.
By right-clicking any folder or document in Drive, you can access a menu of options that include: Renaming, Starring, Downloading, Sharing, Getting the Link, Changing the Color (Folders only), and Removing (i.e. Trashing) (see picture on right below).
Google Help Center: Drive