Install the extension to your web browser from the Chrome web store or by selecting Account on your Calendly home page to install the extension from Apps page.Access the event types invitees are using to book.See which meetings on your calendar were scheduled through Calendly.When you add the Calendly extension to your Google Calendar, you can: The Calendly extension can help you keep track of where your events are coming from and reschedule with ease, all from within your Google Calendar.