Connecting your calendar (Google or Outlook) lets your clone look up meeting times and details automatically, instead of you having to supply them every time.
Once connected, your clone can:
Find the right meeting when you ask it to "attend the project update call" without giving a URL
Recognize recurring meetings (standups, weekly catchups) and maintain memory across sessions
Confirm meeting details with you before joining anything on your behalf
Your clone will always confirm with you before attending a meeting it found via your calendar.