The new feature launched in beta in November of 2019 and was well-received. The technology relied on Google's extensive AI expertise to help users draft documents and write better emails with less effort.
In addition to suggesting simple spelling corrections, the AI routine used can read and understand the current sentence you're composing. It can work in the context of the paragraph it's in (or the one above it) to deliver real time suggestions on how best to complete the sentence.
If you decide you want to accept the suggestion, simply press the tab key and it will be auto inserted into the document you're creating at the current cursor position. If you decide you don't want to accept Google's suggestion, just keep typing and you can complete the sentence as you like.
The feature proved to be incredibly popular and has since been moved out of beta. As mentioned, it is now available for all G-Suite users. Unfortunately, if you just have an individual G-mail account and use Google Docs, you won't be able to access it. You'll need to wade more fully into Google's ecosystem and embrace the G-Suite to gain access.
Most people will probably find the new feature of value. However, if it cramps your style, you can disable it by going to tools, then to preferences from the top line menu, and un-checking the "Show Smart Compose Suggestions" box.
In tandem with this, Google has also rolled out some changes to Gmail which makes use of the same AI routines, albeit in a slightly different form. When you're composing an email, the new routine will auto correct words as you type and highlight potentially problematic words using a gray dashed underline. You can make use of the undo feature to revert any correction you like.
These are excellent feature additions and we think you'll be thrilled with their inclusion.