Much like you’ll find in the browser-based version of Microsoft Outlook, you can now have the browser-based version of Microsoft Word offer up text predictions, saving you time as you type. Here’s what that looks like…
In the browser-based version of Word, you’ll see an option for Text Predictions. When you click on it, you’ll have the option to turn it on or off (it starts off with the feature being turned on):

If you don’t like the distraction of text showing up that you didn’t type, just toggle the feature off and click OK:

As you type (and it learns your style), it will attempt to fill in the next few words of your sentence. Here, I typed in Today is the first da, and it completed the line with y of the. If I want to use that text, I just have to press the Tab key and my cursor will skip to the end and I can keep typing:

Please note… this feature is in the browser-based version of Microsoft Word.