When you schedule a meeting from the HubSpot CRM, the meeting will only be added to your calendar (and a meeting invitation will only be sent to the contact) if:
- The contact has an email address populated in the Email field.
The Schedule Meeting tab on the contact record has the option to Add to Google Calendar. If you don't see this option, this link will read, Integrate with Google Calendar. Proceed through that setup process and try scheduling your meeting again.