Acer B1-790 User Manual page 7

Important
You must sign in to a Google Account to use Gmail, Hangouts, Google
Calendar, and other Google apps; to download apps from Google Play;
to back up your settings to Google servers; and to take advantage of
other Google services on your tablet.
If you have multiple Google accounts, such as separate accounts for
personal and business contacts, you can access and synchonize
them from the Accounts settings section.
accounts on page 41
Getting started with your tablet - 7
See Multiple Google