Open Microsoft Word: Start by opening your Microsoft Word application. Create or open any file.

Go to the Add-ins Store: Click on the "Home" tab at the top left corner of your Word window. On the toolbar that opens, click on "Add-Ins" button. In the opened popup click "+ More Add-ins" button.

Install the Add-in: In the Add-Ins Store, use the search bar to find the "AI Perfect Assistant for Office". Once you find the add-in, click Add or Install next to its listing.