Yes! A Google FILE or FOLDER can be shared without sending an E-mail notification. Nobody likes when the in-box is flooded with unnecessary E-mail. If a colleague expects a shared file or folder all they need to do is check share with me in Google Drive to see if the folder or file is there. When a colleague doesn’t expect a shared file of folder then make sure the E-mail notification is checked. This way the colleague will receive an E-mail notifying them a shared file or folder is ready for editing or viewing.