I had to look up the Acer to find its OS. As it is the full W8 then it will run Office. W8 RT and many other tablet OS's will not. Office 2013 or Office 365 (which could be the cheapest way for you) are downloaded and you insert the key, which you have bought, during installation.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version