Once it finishes (it will say “Completed”) select “Activate Office”.
If you don’t know how to extract, see this article. This might take from a few minutes to a few hours, depending on your download speed. Click on the download button(s) below and finish downloading the required files.
How to Download and Install Microsoft Office 2016
This article shows you how to download and install the full version of Microsoft Office 2016 for free on PC.