Calendars is where you connect your personal or work calendars to iClosed so events, availability, and bookings stay perfectly in sync.
Connected calendar is here for you to:
get updates about your new bookings on your connected calendar
check for availability conflicts
automatically generate Google Meet link as the location of your event
send email reminders from host Gmail that you can set up in Event Notifications and Workflows
You can connect the Google Calendar from:
AI Scheduler → Calendar page or from 
Settings → Calendars pagefrom
Integrations page
But bear in mind that Google Calendar integration works on a user level, meaning every user would need to connect their own calendar with iClosed account.
Go to
AI Scheduler → Calendar Click on 'Connect Google Calendar' button
You will be redirected to choose the account you want to connect
Select the account and grant all the necessary permissions
Learn more