A family of Microsoft word processing software products for creating web, email, and print documents.
You are doing the right thing when you delete e-mails that encourage you to install unknown products. Microsoft updates are not installed that way.
To find out if there are updates for Office, start Word and click File > Account. On the right-hand side, if you see a notification that updates are available, then you can install them.
Also/alternatively, you can search for updates by clicking Update Options > Update Now.