If you’ve never used suggesting mode in Google Docs, it is a really useful tool. Docs has three modes – Editing, Suggesting and Viewing. You can change to any of the modes by clicking on the pencil icon in the toolbar.
Editing mode is the standard mode that you’ll use when creating a document. It allows you to type and make all changes to a document. It’s the normal “word processing” view. In Suggesting mode, any changes become suggestions that can be either accepted or rejected. Viewing mode puts your document into a “reading” mode to show you what it will look like when printed.